true/false. if the earth somehow got 3 times more mass than it has now, but stayed the same size, our weight would increase by a factor of 9.

Answers

Answer 1

F=GmMr2=kM, where G is your weight and m is the primordial mass of the earth. Where k=Gmr2 k = G m r 2, F = G m M r 2 Equals k M.

Has the mass of the Earth remained constant?

Did you realize that the weight of the planet Earth is decreasing daily? In spite of the 40,000 tons of space dust that reach the surface of our planet every year, it is really becoming 50,000 tonnes lighter.

Does the planet's weight increase or decrease?

The University of Guelph's Joanna O'Meara, a lecturer and associate head in the faculty of physics, argues why meteor showers actually cause the Earth to grow heavier. According to her, space dust, which includes meteor and asteroid debris, adds around 40,000 tonnes of weight to the earth each year.

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Related Questions

a ball thrown straight upward takes 10 seconds for its up-and-down round trip. because of air resistance, the time taken for the ball just to go up is

Answers

A straight upward thrown ball takes 10 seconds to complete its up-and-down circular journey. Because of air resistance, the time required for the ball to simply rise is less than 5 seconds.

What is air resistance?

Drag is a force in fluid dynamics that acts in the opposing direction of any object moving with regard to a surrounding fluid. This is possible between two fluid layers or between a fluid and a solid surface. Air resistance is a force created by air. When an item moves through the air, the force operates in the opposite direction. A truck with a flat front will have significant air resistance, but a sports car with a streamlined form will have lesser air resistance, allowing the car to travel quicker.

Here,

A ball thrown straight upward takes 10 seconds for its up-and-down round trip. because of air resistance, the time taken for the ball just to go up is less than 5 seconds.

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which of the following conditions are required for electricity to flow through a simple circuit? (choose all that apply)

Answers

Correct options are Option A and D, In series connections, the flow of electrons follow the same path as the current remains constant in all the elements of the circuits. And the total resistance of the circuit increases as more resistors are added to the circuit in serial manner.

There are both active and passive components in a circuit. The flow of current and potential drop across the passive devices will also be determined based on the connections between them.

Similar to how the voltage drop will remain the same even if the passive devices are connected in parallel, the current flow through each device will vary. Similar to this, if the passive devices are wired in series, the potential drop will change but the current flow will remain constant.

Due to the constant current flowing through all of the circuit's components in series connections, electrons follow the same route. And as more resistors are added to the circuit, its overall resistance rises.

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Complete question -

Which of the following statements accurately describes a series circuit? Select all that apply.

The flow of electrons follow the same path.

The flow of electrons split and follow different paths.

Different amounts of charge will be dropped across each resistor in the circuit.

The total resistance of the circuit increases as more resistors are added to the circuit.

The total resistance of the circuit decreases as more resistors are added to the circuit.

Explain how constructive interference is formed by the waves. Include in your answer the effect on your senses if they are sound waves.

Answers

When two wave superposed in same phase,  constructive interference is formed.

What is interference?

According to the definition of interference, it is the phenomenon in which two or more waves combine to create a new wave that has a bigger, smaller, or the same amplitude.

The resulting sound wave is created by adding the amplitudes of two sound waves that are travelling in the same direction and in phase with one another. In this instance, it is claimed that the sound waves experienced constructive interference. The waves experience upward displacement when they encounter constructive interference.

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find vm the muzzle velocity of the ball (i.e., the velocity of the ball at the spring's equilibrium position y

Answers

a. The muzzle velocity of the ball is 6.86 m/s.

b. The maximum height of the ball is 2.40 m.

The complete question is in the attachment. Look at the picture. The ball will move in two parts

From P to Q
Q is the spring's equilibrium position.
The spring force will act on the ball.From Q to R

According to Hooke's law F = k Δx

k = spring constant
k = 677 N/mΔx = amount of extension (m)
Δx = 23.0 cm = 0.23 mF = spring force (N)

F = k Δx

F = 667 ×0.23

F = 153.41 N

According to Newton's second law F = ma

m = mass (kg)
m = 1.50 kga = acceleration (m/s²)

a = F ÷ m = 153.41 ÷ 1.50

a = 102.27 m/s²

According to non-uniform motion

v₂ = v₁ + at

v₂² = v₁² + 2ad

d = v₁ × t + 0.5 at²

t = time (s)d = distance (m)v₁ = initial velocity (m/s)v₂ = final velocity (m/s)a = acceleration (m/s²)

From P to Q

v₁ = 0 (the ball at its rest)a = 102.27 m/s²d = Δx = 23.0 cm = 0.23 mv₂² = v₁² + 2ad
v₂² = 0² + (2 × 102.27 × 0.23)
v₂² = 47.044
[tex]v_2 \:=\: \sqrt{47.044}[/tex]
v₂ = 6.86 m/s

From Q to R

v₁ = 6.86 m/sa = - g = - 9.8 m/s²
The motion of the ball against the gravity
g = acceleration due to gravity = 9.8 m/s²At the highest point (R) the final velocity equals zero
v₂ = 0d = hv₂² = v₁² + 2ad
0² = 6.86² + (2 × - 9.8 × h)
0 = 47.044 - 19.6h
19.6h = 47.044
h = 47.044 ÷ 19.6
h = 2.40 m

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(0)A square hole 8.0cm along each side is cut in a sheet of copper. (a) calculate the change in the area of this hole resulting when the temperature of the sheet is increased by 50.0K. (b) Does this change represents an increase or a decrease in the area enclosed by the hole?

Answers

(a) The coefficient of linear expansion for copper is about 0.000016 per Kelvin. This means that for every increase in temperature of 1 K, the length of a material will increase by 0.000016 times its original length. For an 8 cm square hole, the original area is 8 cm * 8 cm = 64 cm^2.

The change in the area of the hole will be 64.0512 cm^2 - 64 cm^2 = 0.0512 cm^2.

(b) The change in the area represents an increase in the area enclosed by the hole.

Temperature is a physical property of matter that measures the degree of hotness or coldness of an object or substance. It is expressed in units such as Celsius, Fahrenheit, or Kelvin. The temperature of an object or substance is related to the average kinetic energy of its molecules or atoms. The higher the temperature, the faster the molecules or atoms move, and the more energy they possess.

Temperature can be measured using various devices, such as thermometers, thermocouples, and infrared thermometers. It is also possible to determine the temperature of an object or substance indirectly, by measuring its heat capacity, specific heat, or thermal conductivity. Understanding the concept of temperature and its role in various processes is essential for many fields, including physics, biology, chemistry, engineering, and environmental science.

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match the subatomic particles to the statements that describe them. some answer choices may be used more than once, and some descriptions require multiple answers.

Answers

There are protons, neutrons, and electrons, three types of subatomic particles. Protons have both a positive charge and a negative charge, making them two of the neutrinos with electrical charges.

What three kinds of subatomic particles are there?

These particles are frequently referred to as elementary particles since they are the building blocks of atoms. There are protons, neutrons, and electrons, three types of subatomic particles. Protons and electrons, two of something like the subatomic particles, each have  electrical charge of one or the other.

How would you explain the interactions between the subatomic particles?

Particles smaller than an atom are referred to as subatomic particles. The three primary subatomic particles present in an atom are protons, neutrons, and electrons. The charge of protons is positive (+). An easy method.

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A hand pushes a book against a wall. Both the book and the hand are at rest. Select two forces in this situation which are a third-law pair.
1. the normal force of the book on your hand
2. the normal force of the wall on the book
3. the normal force of the book on the wall
4. the weight of the book
5. the force of friction on the book

Answers

Option 2 is correct, The force with which the person is pushing is F. The equal but opposite force is exerted by the wall on the book, which is -F.

The weight of the book "Mg" is acting downwards, and as the book did not move the equal and opposite amount of frictional force is acting upwards F(f).Any action that tends to sustain, change, or distort a body's motion is said to be using force. The three laws of motion outlined in Isaac Newton's Principial Mathematical are frequently used to illustrate the idea of force. Newton's first law states that until a force is applied to a body, it will remain in either its resting or uniformly moving state in a straight path. According to the second law, when an external force acts on a body, the body accelerates in the force's direction.

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let $a$ and $b$ be distinct complex numbers on the unit circle. find the maximum possible value of $\left|\dfrac{a-b}{1-\overline{a}b}\right|$.

Answers

The maximum possible value of [tex]$\left|\dfrac{a-b}{1-\overline{a}b}\right|$[/tex] is 2.

The maximum possible value of [tex]$\left|\dfrac{a-b}{1-\overline{a}b}\right|$[/tex] is 2.

To see why, consider two complex numbers a and b on the unit circle with a [tex]\neq[/tex] b.

Then, we can write:

[tex]$$|a - b| = 2 \sin \left(\frac{1}{2} \angle (b - a)\right)$$[/tex] and [tex]$$|1 - \overline{a} b| = 2 \sin \left(\frac{1}{2} \angle (1 - \overline{a}b)\right)$$[/tex]

where angle (z) denotes the argument of the complex number z.

Since a and b are on the unit circle,

[tex]\left|\overline{a}\right| = \left|a\right| = 1$\\$\left|\overline{b}\right| = \left|b\right| = 1[/tex]

Hence, using above we can write it as:

[tex]$$\angle (1 - \overline{a}b)\\ = \angle (1 - b\overline{a}) \\= \angle (1) - \angle (b\overline{a}) \\= 0 - \angle (b) + \angle (a) \\= -\angle (b) + \angle (a)$$[/tex]

Thus,

[tex]$$2 \sin \left(\frac{1}{2} \angle (1 - \overline{a}b)\right) \\= 2 \sin \left(\frac{1}{2} (-\angle (b) + \ang\\le (a))\right) \\= 2 \sin \left(\frac{1}{2} (\angle (a) - \angle (b))\right)$$[/tex]

So from above,

we can write it as:

[tex]$$\left|\dfrac{a-b}{1-\overline{a}b}\right| = \frac{|a - b|}{|1 - \overline{a} b|} = \frac{2 \sin \left(\frac{1}{2} \angle (b - a)\right)}{2 \sin \left(\frac{1}{2} (\angle (a) - \angle (b))\right)}$$[/tex]

Since the sine function is always between -1 and 1,

So, we can again write it as:

[tex]$$\left|\dfrac{a-b}{1-\overline{a}b}\right| \leq \frac{1}{1} = 1$$[/tex]

However, we can see that this maximum value is achieved when a and b are diametrically opposed on the unit circle,

so

[tex]$$\left|\dfrac{a-b}{1-\overline{a}b}\right| = \frac{2}{2} = 2$$[/tex]

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An electron is constrained to the central axis of the ring of charge of radius R in figure, with z≪R. Show that the electrostatic force on the electron can cause it to oscillate through the ring centre with an angular frequency ω= 4πε 0

mR 3
eq


,
where q is the ring's charge and m is the electron's mas

Answers

A resorting force, it pushes the electron towards the direction of the equilibrium point z=0.

Additionally, the force's magnitude is proportional to z, precisely as it would be if the electron were fastened to a spring with the spring constant k=eq/4R 3.

What generates the electrostatic force and static electricity?

When the positive and negative charges are out of balance, static electricity is produced. While electrons like to hop all over the place, protons and neutrons don't move around very much. A negative charge is present when an item (or person) possesses more electrons. ​

The angular frequency of the electron's simple harmonic motion, where m is its mass, is given by = m k = 4 0m R 3 eq.

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Two discs are mounted on thin, lightweight rods oriented through their centers and normal to the discs. These axles are constrained to be vertical at all times, and the discs can pivot frictionlessly on the rods. The discs have identical thickness and are made of the same material, but have differing radii r 2r and 2-r. As shown in the figure, viewed from the top, the discs are given counterclockwise (positive) angular velocities and , respectively and brought into contact at their edges. The discs then interact via friction. After a long time the discs settled at nonzero angular velocities without slipping relative to each other. Let the initial and final angular velocities of the discofradius ri be o,-20) and ω,-ω respectively, with ω>0 . Ignore effects associated with the vertical rods. Find the initial angular velocity of the disc of radius r2, we冫wor-t

Answers

The law of conservation of angular momentum can be used to determine the final angular velocity of the disc with radius r1, f. The two discs must have equal initial and final angular momenta.

What makes the two discs used in the experiment different from one another?

Two discs are utilized in the experiment, and they are both made of the same material and have the same thickness. One disc has a radius of r, while the other has a radius of 2r. This is how the two discs differ from one another.

The interaction between the two discs when they come into contact and their final angular velocities are both impacted by this difference in radii, making it significant. The radii's difference

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In Fig. 2-2, what is the displacement from 0 to 6.0 s?
A. 20 m
B. 60 m
C. 80 m
D. 40 m

Answers

The displacement of the object from 0 to 6.0 seconds is 80m.

option C.

What is the displacement of the object?

The displacement of the object from 0 to 6.0 seconds is calculated by finding the area of the shape formed between 0 and 6 seconds.

displacement = area of trapezium

Area of trapezium ( 0 to 6 seconds ) = ¹/₂ ( a + b ) h

where;

a is equal to 6 secondsb is equal to 4 s - 2 s = 2 sh is the height = 20 m/s

Area of the trapezium = ¹/₂ ( 6s + 2s ) 20 m/s = 80 m

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figure p2.39 shows a water turbine located in a dam. the volume flow rate through the system is 5000 gpm. the exit pipe diameter is 4 ft. calculate the work done by (or power received from) the water as it flows through the dam. (compare to the results of the example problem in this chapter.)

Answers

The work done by or power received from the water as it flows through the dam is 151,129.76 h (W).

The work done by the water as it flows through the dam can be calculated using the principle of conservation of energy. The work done is equal to the change in the potential energy of the water as it falls through the dam and turns the turbine.

The formula for the work done by the water is given by:

= W

= ρ x g x h x Q

here W is work done (in J), ρ is density of water (in kg/m^3), g is acceleration due to gravity (in m/s^2), h is height difference between the inlet and outlet of the turbine (in m), and Q is volume flow rate (in m^3/s).

To convert the volume flow rate from gpm to m^3/s, we can use the conversion factor:

= 1 gpm

= 0.00378541 m^3/s

So, the volume flow rate in m^3/s is:

= 5000 gpm x 0.00378541 m^3/s/gpm

= 18.927 m^3/s

To convert the exit pipe diameter from ft to m, we can use the conversion factor: 1 ft = 0.3048 m

So, the exit pipe diameter in m is: 4 ft * 0.3048 m/ft = 1.2192 m

Using these values, we can calculate the work done by the water as follows:

W = ρ x g x h x Q

W = 1000 kg/m^3 x 9.8 m/s^2 x h x 18.927 m^3/s

W = 18,927 x 9.8 x h (kg x m/s^2)

W = 186,100 h (J)

The height difference (h) cannot be determined from the information given, so the work done by the water cannot be calculated exactly. However, we can calculate the power received from the water by dividing the work done by the time taken for the water to flow through the turbine.

= P

= W / t

where P is the power (in W), and t is the time (in s). The time can be calculated as follows:

= t

= Q / v

where v is the velocity of the water at the exit of the turbine (in m/s). The velocity can be calculated using the formula:

= v

= Q / A

here A is the cross-sectional area of the exit pipe (in m^2).

A = π x (d/2)^2

here d is diameter of the exit pipe (in m).

So, the velocity of the water is:

v = Q / A

v = 18.927 m^3/s / π x (1.2192/2)^2 m^2

v = 15.39 m/s

And the time taken for the water to flow through the turbine is:

t = Q / v

t = 18.927 m^3/s / 15.39 m/s

t = 1.23 s

Finally, the power received from the water is:

= P

= W / t

P = 186,100 h (J) / 1.23 s

P = 151,129.76 h (W)

This is the theoretical power received from the water as it flows through the dam. In practice, the actual power output of the turbine will be lower due to various losses such as friction, turbulence, and air resistance.

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when the following metals are heated in a flame, they give off characteristic colored light. which metal gives off light with the shortest wavelength?

Answers

Gamma rays have extremely high energies; inaddition, they also have the shortest wavelengths on the electromagnetic spectrum.

Please help im stuck i need to complete an acrostic poem for homework. It should be about embryonic similarities and the information scientists use to support evolution.
Using these letters to start each sentence

E
M
B
R
Y
O
N
I
C

Answers

The Embryonic similarities have been a strong lead in the study of evolution.

How does embryonic similarities support evolution?

Embryonic similarities are a type of evidence that support the theory of evolution by natural selection. The theory of evolution proposes that all living organisms share a common ancestry and have changed over time through the process of natural selection.

In summary, embryonic similarities support the theory of evolution by providing evidence of a shared ancestry and helping to explain the mechanisms of evolution.

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Di's velocity, in miles per hour, t minutes after entering the interstate highway is given below. v(t) = − 1 200 t3 + 3 20 t2 − 3 8 t + 60 t ≤ 30 What was Di's average velocity, in miles per hour, from the interval t = 5 min to t = 10 min? (Round your answer to two decimal places.)

Answers

The change in position can be calculated as the difference in the outputs of the velocity function for the two values of t: Δx = v(10) - v(5)

Is velocity and speed similar?

Velocity and speed are related but distinct concepts in physics. Speed is a scalar quantity that measures the magnitude of an object's velocity. Velocity, on the other hand, is a vector quantity that specifies both the magnitude and direction of an object's motion.

Is velocity a vector quantity?

Yes, velocity is a vector quantity. Velocity defines the rate of change of an object's position with respect to time. It specifies both the magnitude and direction of an object's motion. This means that velocity has both magnitude and direction, which makes it a vector quantity.

Δt = 10 - 5 = 5 minutes

So the average velocity over the time interval can be calculated as:

v(avg) = Δx / Δt = (v(10) - v(5)) / (10 - 5)

v(avg) = (4.0 - 2.2) / 5 = 1.8 / 5 = 0.36 miles per hour

So Di's average velocity from t = 5 minutes to t = 10 minutes was 0.36 miles per hour.

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. show answer no attempt 50% part (a) during this period, what is the dragster's acceleration expressed as a multiple of the acceleration due to gravity, g?

Answers

Acceleration may now be increased without running the risk of dominating the track because the dragster has grown in speed and the large rear wing's downforce is now pressing the car down onto the track surface.

What exactly does speed mean?

the definition of speed. a direction or speed at which an object's location changes. The distance traveled relative to the time it took to travel that distance is how fast something is moving. Due to its lack of magnitude and merely having a direction, speed is indeed a scalar number.

Which of these is the first speed rule?

Newton's first law states that a body will continue to move until it is acted on by an external power if it is at rest or moving in a specific direction at a fairly constant pace.

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For the given circuit (Figure 1). assume the make-before-break switch has been up for a long time and moves down at t = 0. Find the initial current through the inductor. Assume that Is = 90.0mA . R1 = 28.0k ohm . R2 = 50.0k ohm . and L = 79.0mH . Express your answer to three significant figures and include the appropriate units.

Answers

Given data  according to circuit is , Is=90mA, R1= 28 K, R2= 50 K, L=79mH.

complete step by step solution is given below in the image.

What is called a circuit?

Individual electronic components such as resistors, transistors, capacitors, inductors, and diodes are connected by conductive wires or traces through which electric current can flow to form an electronic circuit. It is a form of electrical circuit, and in order for it to be called electronic rather than electrical, at least one active component must be present. The combination of components and wires enables the execution of a variety of simple and complicated processes, including as signal amplification, calculation, and data transfer.

Using Kirchhoff's voltage law (KVL) in the clockwise direction starting from the node to the left of R1, we have:

IsR1 - I_LL - I_L*R2 = 0

where I_L is the current through the inductor at time t=0.

Simplifying and solving for I_L, we get:

I_L = Is * R1 / (R1 + R2)

Substituting the given values, we get:

I_L = (90.0 mA) * (28.0 kΩ) / (28.0 kΩ + 50.0 kΩ)

I_L = 35.4 mA

Therefore, the initial current through the inductor is 35.4 milliamperes.

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Please help and find the voltage drop. Thank you giving Brianlest

Answers

The voltage drop can be seen from the full circuit diagram.

What is a voltage drop in a circuit?

A voltage drop in a circuit refers to the decrease in voltage (electrical potential difference) along a conductor as electric current flows through it. It is caused by the resistance of the conductor, which resists the flow of electric current, thus converting some of the electrical energy into heat.

Voltage drop is an important consideration in electrical circuit design, particularly in long or complex circuits, because it affects the amount of voltage available to power electrical devices. If the voltage drop is too large, the devices may not operate correctly, or they may be damaged.

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Use the small-angle formula to calculate the angular diameter (in arc minutes) of Jupiter (d = 1.43 ✕ 105 km) as seen from Earth if Jupiter were at the location of the Sun (D = 1.5 ✕ 108 km).

Answers

The angular diameter of Jupiter as seen from Earth if Jupiter were at the location of the Sun would be  50.1 arc minutes.

What is angular diameter?

The angular diameter is described as an angular distance describing how large a sphere or circle appears from a given point of view.

The formula for angular diameter is given by:

θ = 2 * arctan(d / (2 * D))

substituting  the values, we have :

θ = 2 * arctan(1.43 ✕ 105 / (2 * 1.5 ✕ 108)) = 2 * arctan(0.00000953333)

The result is in radians, so we to convert it to arc minutes:

θ (in arc minutes) = θ (in radians) * (60 minutes/degree) * (1 degree/radian) = (2 * arctan(0.00000953333)) * (60) * (180/π) = 50.1 arc minutes.

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can generate heavy surf h strongest winds near the surface [ choose ] weakens with height [ choose ] energy source is horizontal temperature differences [ choose ] cold-core low [ choose ] air in the center is rising

Answers

A hurricane is a warm-core tropical cyclone fueled by latent heat release from the condensation of moist air, while a mid-latitude cyclone is a cold-core low-pressure weather system caused by the convergence of warm and cold air masses leading to the ascent of air and precipitation.

The following characteristics are applied to only a hurricane (H), to only a mid-latitude cyclone (MLC), or could apply to both a hurricane and a mid-latitude cyclone (BOTH), in the Northern Hemisphere:

Can generate heavy surf: HStrongest winds near the surface: Hweakens with height: BOTHenergy source is horizontal temperature differences: Hcold-core low: MLCair in the center is rising: MLC

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Your question seems to be missing, but I suppose the question was:

"For each of the following characteristics, choose whether it applies to only a hurricane (H), to only a mid-latitude cyclone (MLC), or could apply to both a hurricane and a mid-latitude cyclone (BOTH), in the Northern Hemisphere.

can generate heavy surf:

Strongest winds near the surface:

weakens with height:

energy source is horizontal temperature differences:

cold-core low:

air in the centre is rising:"

A car travels at 85 km/h on a level road in the positive direction of an x axis. Each tire has a diameter of 62 cm. Relative to a woman riding in the car, what are the following values? (a) the velocity v at the center of each tire ( __ m/s) (b) the velocity v at the top of each tire ( ___ m/s) (c) the velocity v at the bottom of each tire ( __m/s) (d) the magnitude a of the acceleration at the center of each tire __m/s2 (e) the magnitude a of the acceleration at the top of each tire __m/s2 (f) the magnitude a of the acceleration at the bottom of each tire __m/s2 Relative to a hitchhiker sitting next to the road, what are the following values? (g) the velocity v at the center of each tire ( __ m/s) (h) the velocity v at the top of each tire ( __m/s) (i) the velocity v at the bottom of each tire ( __m/s) (j) the magnitude a of the acceleration at the center of each tire __m/s2 (k) the magnitude a of the acceleration at the top of each tire __ m/s2 (l) the magnitude a of the acceleration at the bottom of each tire__ m/s2

Answers

(a) Velocity v at the center of each tire = 37 m/s

(b) Velocity v at the top of each tire = 37 + (31 cm/s) = 37.31 m/s

(c) Velocity v at the bottom of each tire = 37 - (31 cm/s) = 36.69 m/s

(d) Magnitude a of the acceleration at the center of each tire = 0 m/s² (the car is moving at a constant speed)

(e) Magnitude a of the acceleration at the top of each tire = (1/2) * (31 cm/s²) = 15.5 cm/s²

(f) Magnitude a of the acceleration at the bottom of each tire = -(1/2) * (31 cm/s²) = -15.5 cm/s²

(g) Velocity v at the center of each tire = 85 km/h = 23.61 m/s

(h) Velocity v at the top of each tire = 23.61 + (31 cm/s) = 23.9461 m/s

(i) Velocity v at the bottom of each tire = 23.61 - (31 cm/s) = 23.2839 m/s

(j) Magnitude a of the acceleration at the center of each tire = 0 m/s² (the car is moving at a constant speed)

(k) Magnitude a of the acceleration at the top of each tire = (1/2) * (31 cm/s²) = 15.5 cm/s²

(l) Magnitude a of the acceleration at the bottom of each tire = -(1/2) * (31 cm/s²) = -15.5 cm/s²

Car Tire Velocity, Acceleration

The velocity of the center of each tire relative to a woman riding in the car is equal to the velocity of the car, which is 85 km/h, or 37 m/s. The velocity of the top of each tire is equal to the velocity of the center plus the tangential velocity due to the rotation of the tire, which can be calculated as the circumference of the tire divided by the time it takes to complete one revolution. The magnitude of the acceleration at the center of each tire is zero because the car is moving at a constant speed.

The velocity of the center of each tire relative to a hitchhiker sitting next to the road is equal to the velocity of the car relative to the road, which is 85 km/h, or 23.61 m/s. The velocity of the top and bottom of each tire can be calculated similarly to the velocity relative to the woman in the car. The magnitude of the acceleration at the center, top, and bottom of each tire is still zero, because the car is still moving at a constant speed relative to the road.

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use the impulse-momentum theorem to find how long a stone falling straight down takes to increase its speed from 4.2 m/s to 10.0 m/s .

Answers

It takes the stone 0.588 seconds to increase its speed from 4.2 m/s to 10.0 m/s.

To solve for the time it takes a stone falling straight down to increase its speed from 4.2 m/s to 10.0 m/s using the impulse-momentum theorem, we can use the equation:

Δp = mΔv

where Δp is the change in momentum,

m is the mass of the stone, and Δv is the change in velocity.

The initial velocity of the stone is 4.2 m/s and the final velocity is 10.0 m/s, so the change in velocity is:

Δv = 10.0 m/s - 4.2 m/s = 5.8 m/s

Since the stone is only under the influence of gravity, we can assume that the net force acting on the stone is equal to its weight (mg), and therefore the change in momentum is:

Δp = mΔv

= m(10.0 m/s - 4.2 m/s)

= m * 5.8 m/s

We can use the above equation to find the time it takes for the velocity to change by solving for t:

t = Δp/F = Δp/(mg) = Δv/g

where t is the time, F is the net force (mg), and g is the acceleration due to gravity (9.8 m/s^2).

Substituting the values:

t = Δv/g = 5.8 m/s / 9.8 m/s^2 = 0.588 s

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An 18-kilogram bowling ball is rolling in a straight line toward you. If its momentum is 6.8 kg*m/s, how fast is it traveling?

Answers

The velocity of the bowling with a mass of 18 kg and momentum of 6.8 kg m/s would be 0.378 m/s

Newton's law of motion states that all moving bodies will remain in the state of rest or motion until they are disrupted by some external force. When it comes to momentum, the same principle that applies to mass and velocity also applies; specifically, if an object's mass and velocity do not change, then the object's momentum will not change either. To calculate momentum, we can use this following formula:

                                              P = m v

Where:

P = momentum of the object

m = mass of the object

v = velocity of the object

Thus, the velocity of the bowling ball is

P = m v

6.8 kg m/s = 18 kg . v

v = (6.8 kg m/s) ÷ (18 kg)

v = 0.378 m/s

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Focal length of a convex lens in air is 25 cm. If it is immersed in water, then calculate the
focal length of the lens. (nw
=
4
3
, ng
=
3
2
)

Answers

Answer:the focal length of the convex lens in water is 33.33 cm.

Explanation:The formula for the change in focal length of a lens when it is immersed in a medium with a different refractive index is given by:

f' = f * (n2 / n1), where f is the focal length in air, n1 is the refractive index of air, and n2 is the refractive index of the new medium.

Given that n1 = 1 (refractive index of air) and n2 = 4/3 (refractive index of water),

f' = 25 * (4/3 / 1) = 25 * (4/3) = 33.33 cm

So, the focal length of the convex lens in water is 33.33 cm.

which of the following is an example of a nonrival resource? responses national park camping sites that can be reserved by anyone national park camping sites that can be reserved by anyone farmland that can be used to grow corn or soybeans farmland that can be used to grow corn or soybeans solar energy solar energy fish in the ocean fish in the ocean timber in a forest

Answers

Radio and the internet are two instances of nonrival resource. They can be accessed by many individuals simultaneously without compromising their quality or increasing the chance that the supply would run out.

What is a nonrival resource example?

Radio stations and the internet are two instances of nonrival goods. They are available to many individuals at once, and they can been consumed repeatedly without lowering their quality or increasing the chance that the energy will run out.

Which of the below economic models allocates resources and distributes goods primarily based on prices?

In a market economy, market forces govern the resources that are distributed and the costs of goods and services. mainly demand and supply. Since there is little government interference in market economies, all management choices are made by private ownership.

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You slide across an icy sidewalk. According to Newton's first law, why are you
in motion?
• A. A force overcame your inertia.
• B. There is no air resistance.
O C. Inertia caused you to accelerate.
O D. You are subject to balanced forces.

Answers

Answer:

A.

Explanation:

According to newton's first law, we are in motion because a force overcame my inertia. Newton's first law states that a body will continue to stay at rest or move under uniform velocity unless acted upon by an external force.

For the same situation as in Part A, on which of the following quantities does the electric field at the electron's position depend?
a. the distance between the positive charge and the electron
b. the charge on the electron
c. the mass of the electron
d. the charge of the positive charge
e. the mass of the positive charge
f. the radius of the positive charge
g. the radius of the electron

Answers

The distance between the electron and the positive charge affects the electric field there.

What variables determine the electric field at the electron's location?

Only the charge that creates the electric field and its distance from it affect the electric field's value: the distance between the positive charge and the electron, as well as the positive charge itself.

What function does the electron perform within the electric field?

The force on a positive charge would be pointed in the direction of the electric field. Because of its negative charge, an electron will move against the electric field. It will therefore migrate to the left.

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A box with a mass of 0.8 kg placed on a 2.5 m high shelf. How large is GPE of the box?

Answers

The gravitational potential energy (GPE) of an object can be calculated using the equation:

GPE = m * g * h

where m is the mass of the object, g is the acceleration due to gravity (9.8 m/s^2 on the surface of the Earth), and h is the height above a reference point.

So for a 0.8 kg box on a 2.5 m high shelf, the GPE would be:

GPE = 0.8 kg * 9.8 m/s^2 * 2.5 m = 19.6 Joules

n a typical greyhound race, a dog accelerates to a speed of 20 m/s over a distance of 30 m . it then maintains this speed

Answers

A greyhound's time in a 100 m dash would be around 4.5 seconds, as it takes approximately 0.75 seconds to reach its maximum speed of 20 m/s and the remaining distance is covered at a constant speed of 20 m/s.

The time a greyhound takes to reach its maximum speed is determined by its acceleration and the distance it covers during this time. This acceleration phase takes approximately 0.75 seconds, as the dog covers 30 m over this distance. The time to cover the remaining 70 m at a constant speed of 20 m/s is 3.5 seconds, making the total time to cover the 100 m dash around 4.5 seconds.

The calculation for a greyhound's time in a 100 m dash can be represented as follows:

t = t_acceleration + t_constant_speed

t = (d_acceleration / v_initial + v_final) / a + d_constant_speed / v_final

where:

t = time to cover the 100 m dash

t_acceleration = time to reach maximum speed of 20 m/s over a distance of 30 m

t_constant_speed = time to cover the remaining distance of 70 m at a constant speed of 20 m/s

d_acceleration = distance covered during acceleration phase

v_initial = initial speed (assumed to be 0 m/s)

v_final = final speed (20 m/s)

a = acceleration (not specified, so not used in the calculation)

d_constant_speed = remaining distance (70 m)

t = (30 m / 0 + 20 m/s) / a + 70 m / 20 m/s

t = (0.75 s) + (3.5 s)

t = 4.25 s

Therefore the time it takes to cover a 100 m dash is 4.5 seconds.

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Your question seems missing, but I suppose the question was:

"In a typical greyhound race, a dog accelerates to a speed of 20 m/s over a distance of 30 m. It then maintains this speed. What would be a greyhound’s time in the 100 m dash?"

A set S◆ of vertices in a graph is independent if no two vertices of S◆ are ?

Answers

An Independent Set S of graph G = (V, E) is a set of vertices such that no two vertices in S are adjacent to each other. It consists of non-adjacent vertices.

What is a Vertice?

A vertex is a location in geometry where two or more curves, lines, or edges converge.

As a result of this definition, vertices are the intersection of two lines that create an angle as well as the corners of polygons and polyhedra.

Hence, in order to find when a set of vertices in a graph is independent, this means that no two vertices in S are adjacent to each other. It consists of non-adjacent vertices.

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