A mechanic working on a 100-m radar tower drops a hammer weighing 44.5 n. the work done on the hammer as it falls is:________

The supply curve measures quantity supplied on the horizontal axis and price on the vertical axis.

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An electric field that has a constant field strength value throughout is said to be uniform. Since the field strength is constant and the field lines are generally parallel and evenly spaced from one another in a uniform electric field. Their separation is equal.

Each point in space has an electric field associated with it when there is a charge present in any form. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field.

An electric field that has a constant field strength value throughout is said to be uniform. Since the field strength is constant and the field lines are generally parallel and evenly spaced from one another in a uniform electric field. Their separation is equal.

Therefore, the correct answer is option D) toward the bottom of the page.

The complete question is:

In which direction does the electric field point?

A) toward the top of the page

B) toward the left of the page

C) toward the right of the page

D) toward the bottom of the page

E) out of the page, toward the reader

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The energy driving the global water cycle is provided by solar energy.

Solar energy is the term for solar radiation, which has the ability to ignite chemical reactions, produce heat, or create electricity. The total solar energy incident on Earth far exceeds both the present and future energy needs of the planet. This highly diffused source might potentially provide all of the energy required in the future if properly harnessed. Due to its limitless supply and lack of environmental impact compared to the finite fossil fuels coal, petroleum, and natural gas, solar energy is predicted to gain popularity as a renewable energy source in the twenty-first century. Although the Sun is a very potent energy source and sunlight is by far the most abundant energy that Earth receives, the intensity of sunlight at the planet's surface is actually rather low.

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The resistance of the resistor which carries 0.40 a when connected to a 9.0-v battery is 22.5 ohm

Given:

current of resistor = 0.40 A

voltage of resistor = 9.0 V

To Find:

the resistance of the resistor

Solution: Resistance of a resistor with current I and voltage V is defined as the ability of the element to resist the flow of current through it. It's SI unit is V/A or ohm. Ohms () are used to express resistance values. Electricity will flow from high to low when two terminals have an electron difference. That flow is countered by resistance. The current decreases as resistance increases. Conversely, the higher the current, the lower the resistance.

Voltage = Current x Resistance

Resistance = Voltage/Current

Resistance = 9 V/0.40 A = 22.5 ohm

Hence, the resistance of the resistor is 22.5 ohm

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The freely falling apple will travel 268.32 meters along y-axis

We need to know about free fall motion to solve this problem. The free fall motion should follow this rule

vt = gt

vt² = 2gh

h = 1/2 . g . t²

where vt is final velocity, g is the gravitational acceleration (9.8 m/s²), h os height and t is time.

From the question above, we know that

t = 7.4 s

Use the third equation to get the distance (height)

h = 1/2 . g . t²

h = 1/2 . 9.8 . 7.4²

h = 268.32 m

The freely falling apple will travel 268.32 meters along y-axis.

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The other-legacy measuring methods' weaknesses are addressed by the bottom-up approach.

An organizational decision-making process known as a "bottom-up approach" begins at the bottom of the hierarchy rather than the top. In actuality, this means that choices won't always be made by the CEO or department head (this is known as a top-down approach).

What distinguishes a bottom-up strategy from a top-down approach?

What bottom-up management has to offer:

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Answer: Oxygen, silicon, iron and aluminum

Explanation: Oxygen, which composes about 49.5% of the total mass of the Earth’s crust, waters and atmosphere, according to the textbook “Modern Chemistry.” Silicon is second at 28%. Aluminum is a distant third, at only 8%. Compounds of silicon and oxygen make up 87% of the materials in the Earth’s crust.

Answer:

solid

Explanation:

it's not liquid, nor gas, so solid.

The half-life of a nuclide that loses 38.0% of its mass in 407 hours is 737 hrs

Let the initial mass of nuclide is N° = 100

The final mass of nuclide after 407 hours

= 100 - 38 = 62

The expression for decay constant is

λ = 1/t ln(N°/Nt)

Substitute the given values and calculate the decay constant as,

λ = 1/407hr ln(100/62)

λ = 9.4 x 10^-4/hr

Now, the half-life is calculated as,

t1/2 = 0.693/λ

= 0.693/9.4 x 10^-4/hr

t1/2 = 737 hrs

Hence, the half-life of a nuclide is 737 hrs

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56 meters have been determined as the distance traveled.

s-displacement, u-initial velocity, v-final velocity, a-acceleration, and t-time variables are equal to v=u + at and v2 = u2 + 2ass, respectively.

The motorcycle's values are as follows:

u= 0m/s

v=28m/s

t=4s

a=??

s=??

v=u +at

28= 0 + 4a

4a=28

a= 7m/s2

As a result, the typical acceleration is 7 m/s2.

displacement u2+2as, v2=s

28^2= 0^2+ (2x7s)

784= 14s

s= 784/14

s= 56

Therefore, the journey's distance was 56 meters.

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The quality (1/2) mv² will be the kinetic energy of the crate .

The kinetic energy of an object is define as , it is a form of energy that an object or a particle has by reason of its motion.

We are know that,

Force exerted on the crate = f

Mass of the crate = m

Speed of motion of the crate =v

Distance traveled by the crate across the floor = d

Time interval passed = t

The motion can be defined as , the change in position of an object with respect to its surroundings in a given interval of time.

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity. If the exert a force f on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.

K.E. = 1/2 m v²

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When the Earth's magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading, and they remain some of the strongest evidence for the theory of plate tectonics.

The specific magnetism of basalt rock is determined by the Earth's magnetic field when the magma is cooling. Scientists determined that the same process formed the perfectly symmetrical stripes on both side of a mid-ocean ridge. The continual process of seafloor spreading separated the stripes in an orderly pattern

With this information, we can conclude that A polarity reversal means that the magnetic North flips to where we know the South Pole is. At the mid-ocean ridge spreading axis.

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Humans convert approximately 40% of the energy stored in food to useful work

Humans can store about 40% of the energy from the food consumed due to the conversion of energy from food through the metabolic process (metabolism).

The other 60% of the energy it is used to maintain the normal function of the body and the other activities that involve physical and mental activities

The energy storage is a reserve of energy that we can use in really difficult situation when the body is with no energy.

The processes of a chemical or physical nature by which the human body converts or uses energy.

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The directions of the vectors for velocity and acceleration are in the opposite directions.

Velocity vector is the rate of change of position of an object. Acceleration vector is the rate of change of velocity of an object.

Therefore, the directions of the vectors for velocity and acceleration are in the opposite directions.

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A- The system's internal energy is constant since the temperature is constant. 0 deltas

B- the system receives no new or removed heat Q=0

C. Because the system's volume remains constant, it does not perform any work. 0 W=p delta v

An isothermal process in thermodynamics is a type of thermodynamic process where the system's temperature T remains constant: T = 0. A thermodynamic process known as adiabatic means that no heat is transferred into or out of the system. An isochoric process in thermodynamics is one in which the volume of the closed system experiencing the process remains constant. It is also known as a constant-volume process, isovolumetric process, or isometric process.

the complete question is :

For each of the following, which thermodynamic quantities (delta u, q, w) have values equal to zero?

A- an isothermal process

B- an adiabatic process

C- an isovolumetric process

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Displacement has direction as well as magnitude. Distance traveled is the total length of the path traveled between two positions.

Astronomers observe a typical star using a telescope and a spectrometer, and thereby they will see a given absorption spectrum of the celestial body.

The absorption spectrum of a given star in space is the light that is emitted by this celestial body in Universe, which can be measured by different technological devices including a spectrophotometer.

In conclusion, astronomers observe a typical star using a telescope and a spectrometer, and thereby they will see a given absorption spectrum of the celestial body.

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The atomic number for an element whose mass number is 115, which contains 66 neutrons per atom is: 49

The formula and procedure we will use to solve this problem is:

Information about the problem:

Applying the number of protons formula  we get:

number of protons = mass number - number of neutrons

number of protons = 115 - 66

number of protons = 49

Applying the atomic number formula  we get:

atomic number =number of protons

atomic number = 49

The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.

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Einstein was the first to postulate that light is made up of photons, which are essentially energy bundles.

A photon is a microscopic particle made up of electromagnetic radiation waves. Maxwell demonstrated that photons are merely electric fields moving through space. Photons move at the speed of light and have no charge or rest mass. Charged particles produce photons, though they can also be produced by other processes, such as radioactive decay.

It's common to refer to photons as energy packets. This analogy is excellent because a photon has uncondensable energy. An alternating electric field is how this energy is kept in reserve. The universe's size, which is the longest theoretical wavelength of light, and the Planck length, which some theories claim to be the smallest, have never been measured. These energy packets may travel great distances without losing energy or speed. In vacuum, photons move at the speed of light, which is 2.997 x 108 m/s.

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Answer: Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Explanation:

Hope this helps!

Answer:

every particle attracts every other particle in the universe with force directly proportional to the product of the masses and inversely proportional to the square of the distance between them.

When Marcus brakes suddenly and comes to a complete stop in 2 seconds the acceleration in km/h/sec is: -7.5 km/h/sec it is negative because it is decelerating

The formula and procedure we will use to solve this exercise is:

a = (vf - vi) /t

Where:

Information about the problem:

Applying the acceleration formula we have:

a = (vf - vi) /t

a = (0 km/h - 15 km/h) /2 sec

a = (-15 km/h) /2 sec

a = -7.5 km/h/sec

Acceleration is negative because it is decelerating

It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2

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Formula:
distance traveled divided by time taken.

So 1.80 Divided by 30 =  0.06
Tabitha's average speed = 0.06

All Done!

The all components of force is F = ( -3.4 i + 7 j ) N  which has magnitude of | F | = 7.78 N.

We need to know about vectors to solve this problem. Force is included in the vector which has magnitude and direction. Force can be written as

F = Fx i + Fy j

where F is force, Fx is the force component on the x-axis, Fy is the force component on the y-axis.

From the question above, we know that

F = (-3.4 , 7.0)

Hence the force can be written as

F = ( -3.4 i + 7 j )N

The magnitude of this force can be determined as

| F | = √(Fx² + Fy²)

| F | = √((-3.4)² + 7²)

| F | = √(11.56 + 49)

| F | = 7.78 N

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The distance from the center of a lens to the point at which light rays converge on the film is known as the focal length of the lens.

In photography, focal length is the distance measured in millimeters (mm) between the optical center of the lens and the camera sensor, where the light information is recorded.

It is important because it dictates the distance your camera will be able to capture. Smaller numbers show more scene and have wider angle while larger numbers show less scene and have tighter angle of view.

The process of recording an image on light-sensitive film is known as photography.

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In a scavenger hunt, participants compete to collect the greatest number of objects from a predetermined list. As opposed to a scavenger hunt, a treasure hunt entails following a sequence of clues to locate a particular thing or objects.

A sheet containing a list of things will be supplied to each team or person. You have to locate every object and take a picture. Whoever has the most photos at the end of the timer wins. You must always remain as a team if you're participating in it. A spot-the-difference game is Photo Hunt. Players are presented with two identical photographs side by side at each stage, with just five distinctions between them.

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When an electron is released from rest in a uniform electric field, its electric potential energy increases and this happens due to Law of Conservation of Energy.

The power that is required to move a charge in opposition to an electric field is known as electric potential energy.

A charge must be moved through a stronger kind of electric field with more energy, but it also must be moved through a weaker electric field but present with more energy.

When an electron is released from rest in a uniform electric field it accelerates opposite to the direction of field. Thus, according to the Law of conservation of energy, this energy is increased.

In any kind of uniform electric field, a positive charge that has been at rest accelerates in the direction of the electric field. Therefore, because of this and as a result of the law of conservation of energy, K.E. rises while P.E. falls.

Therefore, P.E. of positively charged particles decreases because the force q causes charged particles to move faster in the direction of the field.

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The correct answer for  the ratio of the area under the catenary to its arc length is 12 : 1 .

y = 12cosh(x/12) Since the анс length from FGN) on the interval [c, d] is Arc length =

Let y' =f'(x)  prime  = derivative of 12cosh(x/12) for x = Sinh(x/12) .

. A(x)  length = ∫√1+ Sinh² (1/2). dx

= int c ^ d sqrt(cosh^2 (alpha/12)) * dx

= integrate  d from c to d cosh( x 12 )* dx

=[12. sinh(x/12) ] e ^ d

= 12[sinh(d/12) - sinh(c/12)]

and area under f(x) on the interval [c, d]

Area = ∫ f(x).dx from [c,d ]

= 144[sinh(d/12) - sinh(c/12)]

the area ratio of the area under the catenary to it's length is

= 144[sinh((d)/12) - sinh(c/12))/ 12[sinh( d/ 12 ) -sinh( c /12 )] .

=12

So, ratio is 12:1

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Under ground fault conditions, an effective ground path will carry current from the point of a ground fault to electrical supply source

The effective ground path is a low impedance electrically conductive path constructed intentionally to carry current under ground fault conditions. It helps remove dangerous voltage from a ground fault and facilitates overcurrent protective device operation.

Ground fault is a type of short-circuit in which the electricity takes an unplanned path to the ground. It is caused by wrong wiring or damaged insulation / appliance.

Therefore, under ground fault conditions, an effective ground path will carry current from the point of a ground fault to electrical supply source

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