Observations and inferences are important in science. How would you explain the difference between these two words?

The calculated surface tension is 9.36 × (10^-2) N/m.

A liquid's density is a gauge of how heavy it is relative to the amount being measured. The liquid that weighs heavier is denser if you weigh two liquids with similar volumes or amounts. A substance that is less dense than water will float if it is gently introduced to the water's surface.

H equals ((2 cos)/ g r)

2γ = h ρ g r 2γ = 1,8 (10^-5) (1040) (10)

γ = 9 (1040) (10^-4)

γ = 9.36 × (10^-2) N/m

Because it enables us to predict which compounds will float and which will sink in a liquid, density is a crucial notion. As long as an object's density is lower than the liquid's density, it will often float.

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The correct option is type ii supernovae.

Neutron stars and black holes are formed by type II supernovae.

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If the ore is tossed overboard, then the water level in the lock will remain the same.

In the above situation, Archimedes’ Principle is used.

It was given by a Greek Scientist, Archimedes in 246 CE.

According to this principle, the upward buoyant force on a body that is exerted on a body immersed in a liquid is equal to the weight of the liquid displaced by the body.

The formula for Buoyant force is given by the following formula

Force = ρ x g x v

Here  ρ = density of the fluid

g = acceleration due to gravity

v = Volume of the fluid

Thus, When the ore is tossed overboard, then it displaces water equal to its weight, so the water level remains the same.

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The buoyancy force on the gold ball will be more than that of aluminum.

An upward force applied by a fluid against the weight of an item that is partially or totally submerged is known as upthrust, also known as buoyancy. Pressure in a fluid column increases with depth due to the weight of the fluid on top.

Given that two solid metal balls all have the same radius. one is made of aluminum, the other of gold. And the balls are resting at the bottom of a pool of water.

The buoyancy force at the bottom force will be calculated by finding the density of the balls.

Buoyancy force = Volume inside water x Density X g

Density of gold = 19.3 g / cc

Density of aluminium = 2.7 g / cc

Since the density of the gold ball is more than the density of the aluminum ball.

Therefore, the buoyancy force on the gold ball will be more than that of aluminum.

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The charge that has passed through the element the first millisecond is 2.3nc.

Millisecond is a period estimation unit with the image of MS, which is equivalent to a one thousandth of a second. It can likewise be characterized as the span of photograph electric lamp, or as the hour of a cycle for 1kHz recurrence. This unit is at times utilized while estimating extent or making truly exact physical and logical computations. Millisecond is clearly utilized rigorously for logical purposes since estimating this unit of time is very troublesome. This web-based milliseconds to microseconds converter can be exceptionally helpful for understudies, analysts, science fans and the people who are needing making time changes.

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By the half-life of radioactive, the remaining mass of radioactive elements is 2.47 pounds.

We need to know about the half-life of the radioactive elements to solve this problem. The radioactive element will decay over time and follow the equation

N = No(1/2)^(t/t'')

where N is the final quantity, No is the initial quantity, λ is the decaying constant, t is time and t'' is the half-life of a radioactive element.

From the question above, we know that

t'' = 9 years

No = 6 pounds

t = 11.5 years

Calculate the remaining mass

N = No(1/2)^(t/t'')

N = 6(1/2)^(11.5/9)

N = 2.47 pounds

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According to the given statement the height of the object thrown is =20.1m

Initial condition, or initial speed, refers to an object's speed at the start of a measurement. The average speed is the average of the initial and final speeds, or the ratio of the distance travelled to the time required. The speed difference between the initial and final speeds is the change in speed.

Start by dividing the acceleration by the time to determine the beginning velocity. Then, divide that number by 2 and write down the quotient you got. Next, divide the distance by the time and write down that quotient as well. To obtain the beginning velocity, finally remove your first quotient from your second quotient.

The right answer is s= 20.1m

s= -8t+0.5gt^2

t=3

s=20.1 m

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(a) Duration of the ball's flight is 2.5S

(b) Angle of its velocity is 16.1

(c) Speed of the ball is 22.53 m/s

(a). To determine the duration of the ball's flight in

We calculate the whole time when the ball touches the ground, thus we enter y=0 and all other specified values in the equation.

[tex]25sin30t-1/210t^{2} = 0[/tex]

[tex]t = 2.5 s[/tex]

(b) After it has been in the air for one-fourth of this period, determine the angle of its velocity with respect to the ground.

t1=1/4 t = 2.5/4 = 0.625 s

[tex]v_{x} = 25\sqrt{3} /2 m/s[/tex]

[tex]v_{y} = 25/2 - 2.5/2 = 12.5/2 m/s[/tex]

∅= 16.1

(c) To determine speed of the ball for time [tex]t_{1} ,t_{2} , t_{3}[/tex]

[tex]v=\sqrt{v} ^{2}{x} + \sqrt{v} ^{2} y_{}[/tex]

vt1 = 22.53 m/s

vt2 = 21.65 m/s

vt3 = 22.53 m/s

The turning point on the corresponding parabolic curve is where the speed is at its lowest in the xx direction. Physically speaking, the shift in speed does make sense. The ball's initial motion against gravity causes its speed to decrease, but after it reaches the turning point, its speed begins to increase as it descends.

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The population after seven days will be p(7) = 5 [tex]$e^{7k} }[/tex].

We have the following function -

p(t) = 5 [tex]$e^{tk} }[/tex]

We have to determine the total population after 7 days.

In general, growth rate is the measurement of how fast something increases in size during a particular period.

According to the question, we have -

p(t) = 5 [tex]$e^{tk} }[/tex]

Now -

for t = 7 -

p(7) = 5 [tex]$e^{7k} }[/tex]

where k is growth rate.

Hence, the population after seven days will be p(7) = 5 [tex]$e^{7k} }[/tex].

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The astronaut's weight on the surface of Mars is 259 N

To solve this exercise, the formula and procedure to be applied is:

W = m * g

Where:

Information about the problem:

Applying the weight formula, we get:

W = m * g

W = 70 kg * 3.7 m/s2

W = 259 N

In physics, gravity is the force of attraction that the earth exerts on all bodies possessing mass by pulling them toward its center.

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The appropriate word in the blank is → Line.

We have a statement regarding Voltage controls.

We have to fill in the blank with appropriate word.

Voltage control is necessary to prevent damage such as overheating of generators and motors, to reduce transmission losses.

According to the question, we have -

____ voltage controls are simply controls that do not employ the use of a control transformer to change the voltage to a lower value.

The appropriate word for the blank is → Line. Line voltage controls do not employ control transformer to decrease voltage. Line voltage controllers are designed to regulate the voltage of HVAC systems which require direct electrical power. These controllers are also known as inline thermostats and are typically connected to wires supplying 120 to 240 volts of power to heating or cooling device.

Hence, the appropriate word for the blank is → Line

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Answer:

D) diatomic

Explanation:

Diatomic elements form molecules with two atoms together.

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Spacecraft will take around 49 minute and 92 second to coast from perigee to the apogee.

We use Kepler's third law for which the time period is defined as

[tex]T = 2 \pi \sqrt[]{\frac{a^{3} }{GM} }[/tex]

The Prague's altitude is the shortest distance between the earth's surface and satellite.

The average distance of the perigee and  apogee of satellite can be defined as

a = R + [tex]\frac{r_{1} +r_{2} }{2}[/tex]

R is the radius of earth (6374.1km)

r1 is the lower orbit. (500km)

r2 is the higher orbit.(900km)

Using the values in above equation we get:

6374.1+ (500+ 900)/2

a = 7078.1 km

Time taken to fly from perigee to apogee equals to the half of the orbital speed so

t = T/2

[tex]t = \pi \sqrt[]{\frac{a^{3} }{GM} }[/tex]

by using the values we get-

=  √[(7078.1)³/6.67 ×10⁻¹¹ × 6×10²⁴]

= 295573.94 * 10⁻²

= 2995.73s

t = 49 mint 92 sec

It will take around 49 minute and 92 second to coast from perigee to the apogee.

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When selected randomly without replacement the probability that the first 2 selected are white and the last 2 black is 6/91

Given that,

No. of white balls = 6

No. of black balls = 9

Total number of balls = 15

Probability of 1st ball being white = 6/15

Probability of 2st ball being white = 5/14

(Since one white ball is already picked)

Probability of 3rd ball being black = 9/13

(Since two white balls are already picked)

Probability of 4th ball being black = 8/12

(Since two white balls and one black ball is already picked)

The probability that the first 2 selected are white and the last 2 black

= 6/15 * 5/14 * 9/13 * 8/12

= 6/91

Therefore, when selected randomly without replacement the probability that the first 2 selected are white and the last 2 black is 6/91

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The race car that is moving at 40.0 m/s around a circular racetrack of radius 265 m has a period of motion of 41.63 s

To solve this tangential velocity problem the formula and the procedure we will use is:

v = (2 * π * r) / T

Where:

Information about the problem:

Applying the tangential velocity formula and isolating the period, we get:

v = (2 * π * r)/ T

T = (2 * π * r)/ v

T = (2 * 3.1416* 265 m) / 40.0 m/s

T = (1665.04 m) / 40.0 m/s

T = 41.63 s

In physics is the length of arc traveled in each unit of time in uniform circular motion. It is expressed in units of distance per time (m/s), (km/h).

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Yes, The velocity of a ball is 1 m/s at a given instant of time. it is possible for the acceleration of the ball to be -1 at this instant.

If it is made sure that the other values are plugged in correctly, a positive velocity is capable of making a negative acceleration.

A moving item always experiences positive acceleration. An object that is slowing down always experiences negative acceleration. However it does not mean that negative acceleration always mean reduction in speed.

Deceleration always slows down motion. However, negative acceleration is just acceleration in the opposite direction according to the selected coordinate system. Negative acceleration might or might not be deceleration, and vice versa for negative acceleration.

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F is continuous on (2,5) and the range is provided as a bounded interval

Although not true for all functions listed [2,5], this is conceivable. For instance, the unbounded range of the function f(x)=x3 is (), which is defined and continuous on the interval [2,5].

When a function is specified at each point along an interval without any gaps, leaps, or interruptions, the interval is said to be continuous for that function.

We say that a function f(x) is continuous on the interval [a, b] if it meets these requirements from x=a to x=b, for instance.

At the right endpoint b, a function is continuous if. The reasons why the endpoints are defined individually.

Because only one way can be used to check for continuity, the endpoints are defined independently. The values will not be in the domain and won’t apply to the function if the limit of an endpoint is checked from a side that is outside the domain.

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Managers do the crucial duty of controlling when they create precise measuring and monitoring methods to assess how well the firm has achieved its goals.

Software that assists system administrators in monitoring their infrastructure is known as a monitoring system. These tools keep an eye on the hardware, software, and traffic of the system and raise the alarm in the event of errors or disturbances. There are several monitoring systems available, ranging from commercial software to freeware.

The monitoring system broadcasts a signal and logs information about the signal, including whether it was received, how long it took the host to receive it, whether any signal data was lost, and other details.

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The correct answer for the wavelength (405 or 500 nm) based on our evaluation of the absorption spectrum just taken is 405 nm which is Fluorescence .

Fluorescence diagnosis could improve the safety and reliability of stereotactic brain tumor biopsies performed with biopsy needles equipped with integrated fiber optics. Vital tumor tissue can be localized in vivo during the excision procedure using 5-aminolevulinic-acid-induced protoporphyrin IX (PpIX) fluorescence, reducing the number of samples required for a reliable diagnosis. On optical phantoms, the practical suitability of two different PpIX excitation wavelengths (405 nm, 633 nm) was investigated. Violet excitation at 405 nm provides a 50-fold increase in sensitivity for the bulk tumor; ray tracing simulations show that this factor increases up to 100 with decreasing fluorescent volume.

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The left hand plays a steady one-two beat in duple meter, while the right hand emphasizes notes that fall in between these beats. The name for this technique is syncopation.

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By using drift velocity of the electron, the current flow is 7.20 ampere.

We need to know about drift velocity of electrons to solve this problem. The drift velocity can be determined as

v = I / (n . A . q)

where v is drift velocity, I is current, n is atom number density, A is surface area and q is the charge.

From the question above, we know that

d = 2.097 mm

r = (0.002097 / 2) m

v = 1.54 mm/s = 0.00154 m/s

ρ = 8.92 x 10³ kg/m³

q = e = 1.6 x 10¯¹⁹C

Find the atom density

n = Na x ρ / Mr

where Na is Avogadro's number (6.022 x 10²³), Mr is the atomic weight of copper (63.5 g/mol = 0.635 kg/mol).

n = 6.022 x 10²³ x 8.92 x 10³ / 0.635

n = 8.46 x 10²⁷ /m³

Find the current flows

v = I / (n . A . q)

0.00154 = I / (8.46 x 10²⁷ . πr² . 1.6 x 10¯¹⁹)

0.00154 = I / (8.46 x 10²⁷ . π(0.002097 / 2)² . 1.6 x 10¯¹⁹)

I = 7.20 ampere

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Weight is the the gravitational force of the total body mass in the gravitational field. We can feel our weight due to the earth's normal reaction to the weight.

Gravitational force is the kind of attractive force between any two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Therefore when we stand at rest on a pair of bathroom scales, the readings on the scales will always reads the same as the actual weight of our body.

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Explanation:

In the core of the Sun hydrogen is being converted into helium. This is called nuclear fusion.

It takes four hydrogen atoms to fuse into helium atom. During the process some of the mass is converted into energy.

A nuclear reaction combining nuclei of lighter atoms together to form heavier nuclei resulting in the release of tremendous amount of energy is called a nuclear fusion reaction.

Nuclear fusion reaction takes place in the sun.

Answer:

In the core of the Sun hydrogen is being converted into helium. This is called nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy.

In parabolic solar cooker, the container of cooking is placed at the focal point of mirror of parabolic shape so that all rays that are falling on solar cooker can converge to one point and produce large amount of heat energy.

A parabolic solar cooker is a cooking device that works on the energy generated from solar panel.

Though solar cookers are slow to cook, they are green sources of energy utilizer as well as renewable source of energy.

Parabolic solar cookers make the use of a reflector which is parabolic in shape to concentrate sunlight into a smaller area in order to generate heat for cooking. They are able to reach high temperatures, which allows them to be used for grilling and frying. These temperatures are significantly higher than what can be reached by a solar box cookers or solar panel cookers .

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According to the given statement is  At address 0x8004, the default data word is 0xA7908CEE.

Little Endian method with a word size of 4 Bytes is the default on ARM processors.

Data is stored in the memory bytes at a time, and access is done in words.

The data must be stored in 4 cells because word size is equal to 4 bytes.

i.e., the data word is retrieved in parallel from 4 cells.

Little endian states that lower addresses have lower bytes and higher addresses have higher bytes.

At location 0x8004, the default data word is 0xA7908CEE.

The sequence in which data is stored in memory is referred to as the "little-endian" convention. According to this convention, the least significant bit (or "littlest" end) is placed at address 0 first, followed by the storage of following bits one at a time.

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Answer:

4.978 m

Explanation:

[tex]\mathsf v_x[/tex] , the x-component of a vector is given by [tex]\boldsymbol v\cos\theta[/tex] where [tex]\theta[/tex] is the angle formed by the vector with the x-axis. The sign of the x-component depends on which quadrant the vector is

Here [tex]\theta = 77.1[/tex]°

[tex]\cost\theta = \cos(77.1) = 0.22325[/tex]

The vector has magnitude of 22.3 m

So the x-component = 22.3 x 0.22325 = 4.978 m

The rate of reaction is 75.82k mol / l s

We know that,

Rate = k [tex][a]^{x}[/tex][tex][b]^{y}[/tex]

Where,

k = Rate constant

x = Order of reaction of a

y = Order of reaction of b

Given that,

[a] = 3.94 mol / l

[b] = 2.21 mol / l

x = 2

y = 2

Rate = k * [tex]3.94^{2}[/tex] * [tex]2.21^{2}[/tex]

Rate = 75.82k mol / l s

Rate of reaction is the speed at which the reactants are converted to products.

Therefore, the rate of reaction is 75.82k mol / l s

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The rectangular resistors with leads specifically made to fit into printed circuit boards are surface mount resistors.

The resistors are the device which resists the motion of current or electricity.

They are electronic devices used in electrical circuits.

The general type of resistors which are rectangular with leads so taht they fit the circuit boards are called surface mount resistors.

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Heat conduction, also named as thermal conduction, is the heat flux in a body due to temperature difference and occurs by the movement of electrons within a body.

When all the available energies such as electrical energies, chemical energies or the nuclear energies are converted to the thermal energy, the the conversion process is called heat generation.

Thermal conduction is the process when the heat transfers from hotter region to  the colder region.

In heat conduction analysis, the conversion of electrical, chemical or nuclear energy into thermal energy in solids is called as heat generation.

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The number of stars range between 6 * 10^9 stars and 1.2 * 10^10 stars.

We know that a galaxy is composed of many stars. The stars in the galaxy as we saw from the question, using the milky way as a template may have between 200 and 400 billion stars.

The number of stars could be obtained as the product of the number of galaxies and the number of stars in the lower and the upper limits.

Number of stars in the lower estimate = 200 * 10^6 * 30 = 6 * 10^9 stars

Number of stars in the higher estimate = 400  * 10^6 * 30 = 1.2 * 10^10 stars

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