From the frame of reference of car 2, what is the velocity of car

Answer:

Rust occurs when iron or its alloys, such as steel, corrode. The surface of a piece of iron will corrode first in the presence of oxygen and water.The process of rusting is a combustion reaction, similar to fire. Left in contact with oxygen, iron will react with the oxygen to form rust.

Hope this helps!!

Answer:

iron is oxidation reaction

Explanation:

it occurs when iron reacts with water and oxygen to form hydrated iron(iii) oxide

Answer:

9.74 m

Explanation:

Given the following :

Initial Velocity(u) = 42m/s

Horizontal distance (d) = 59.2m

Using the motion equation:

H = ut + 0.5×g×t^2

Where H = height, g = acceleration due to gravity (9.8m/s^2), t = time, u= Initial Velocity

Time(t) = horizontal distance / velocity

t = 59.2 / 42 = 1.41seconds

Therefore,

H = (0 × 1.41) + 0.5(9.8)×(1.41)^2

H = 0 + 9.74169

H = 9.74m

F = 1420 N

Force was required to stretch the spring by the initial 15cm is 1420 N.

m = 15, P = 0.25, x = 0.15

F = -K x for spring

where,

           F = force

           K = constant

ω = (K/m)^1/2

where,

           ω = angular frequency

           m = mass of the block

ω^2 = K / m

K = m ω^2 = m (2 π f)^2 = m 4 π^2 / P^2

K = 4  π^2 m / P^2

F = K x = x * 4  π^2 m / P^2

F = 0.15 * 4 * π^2 * 15 / 0.25^2

F = 1420 N

The movement between two locations back and forth, or to swing back and forth like a pendulum is known as oscillation.

A condition where competing forces or actions are in balance is called equilibrium.

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Answer:

Alternative energy is energy sources other than fossil fuels, including renewable sources and nuclear energy. However, nuclear energy is not classified as a renewable energy source, because it is mined from uranium and thorium elements, which cannot be replenished. Hoped this helped!!!

Answer:

Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn)

Explanation:

hope this helps

Answer:

gap width

diffraction angle

gap width

diffraction angle

Explanation:

i just did it

Answer:

To test this hypothesis, you would change the Gap Width and observe the Diffraction Angle in the system.

Therefore, the independent variable would be the Gap Width and the dependent variable would be the Diffraction Angle.

Explanation:

Edge 2021-2022 :)

The maximum height reached by the rock is approximately 11.34 meters. It takes approximately 3.41 seconds for the rock to hit the ground. To determine the maximum height reached by the rock, we can use the kinematic equation for vertical motion:

h = h0 + v0t - 0.5gt^2

Where:

h is the final height (maximum height),

h0 is the initial height (1.46 m),

v0 is the initial velocity (16.90 m/s),

t is the time, and

g is the acceleration due to gravity (approximately 9.8 m/s^2).

At the maximum height, the final velocity is 0 m/s, so we can use this information to find the time taken to reach the maximum height.

0 = v0 - gt_max

Solving for t_max:

t_max = v0 / g

Substituting the given values:

t_max = 16.90 m/s / 9.8 m/s^2 ≈ 1.72 s

Now, we can substitute the value of t_max back into the equation for height:

h = h0 + v0t_max - 0.5g(t_max)^2

h = 1.46 m + (16.90 m/s)(1.72 s) - 0.5(9.8 m/s^2)(1.72 s)^2 ≈ 11.34 m

Therefore, the maximum height reached by the rock is approximately 11.34 meters.

To determine the time taken for the rock to hit the ground, we can use another kinematic equation:

h = h0 + v0t - 0.5gt^2

At the ground, the final height is 0 m. We can solve for t when h = 0:

0 = 1.46 m + (16.90 m/s)t - 0.5(9.8 m/s^2)t^2

Rearranging the equation to a quadratic form:

0.5(9.8 m/s^2)t^2 - (16.90 m/s)t - 1.46 m = 0

Solving this quadratic equation using the quadratic formula:

t = (-b ± √(b^2 - 4ac)) / (2a)

Where a = 0.5(9.8 m/s^2), b = -16.90 m/s, and c = -1.46 m.

Substituting the values and solving the equation, we find two possible solutions for t:

t = (-(-16.90) ± √((-16.90)^2 - 4(0.5(9.8))(-1.46))) / (2(0.5(9.8)))

t ≈ 3.41 s (positive solution)

Therefore, it takes approximately 3.41 seconds for the rock to hit the ground.

The rock reaches a maximum height of approximately 11.34 meters and takes approximately 3.41 seconds to hit the ground when thrown vertically upward with an initial speed of 16.90 m/s from a height of 1.46 meters.

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Answer: b

Explanation:

Ec= (1/2)m × v^2

By the formula, you can see that the bigger the mass, the bigger the Cinetic Energy.

b: b; its mass is smaller

Between ball B and ball C, ball B has LESS potential energy because its mass is smaller.

A potential energy, stored energy that depends upon the relative position of various parts of a system. A spring has more potential energy when it is compressed or stretched.

Potential energy is given by formula.

\(P.E= m*g*h\)

Since, P.E is directly proportional to mass. Thus, the ball having smaller mass will have the less P.E.

Thus, option b is correct.

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The hypotenuse is the initial velocity of the cannonball (56.0m/s). The opposite side is the vertical component of the velocity and the adjacent side is the horizontal component of the velocity.

To determine the unknowns, we need to use trigonometry. Let's use theta to represent the angle at which the cannonball was launched. The vertical component of the initial velocity can be found using the equation:
Vsin(theta) = opposite side
Vsin(theta) = (56.0m/s)sin(theta)
The horizontal component of the velocity can be found using the equation:
Vcos(theta) = adjacent side
Vcos(theta) = (56.0m/s)cos(theta)
We can use these equations to solve for the unknowns. For example, if we wanted to find the angle at which the cannonball was launched, we could set the two equations equal to each other and solve for theta:
Vsin(theta) = Vcos(theta)
tan(theta) = opposite side/adjacent side
tan(theta) = (56.0m/s)sin(theta)/(56.0m/s)cos(theta)
tan(theta) = sin(theta)/cos(theta)
theta = tan^-1(sin(theta)/cos(theta))
Using a calculator, we find that theta is approximately 51.3 degrees. Therefore, the cannonball was launched at an angle of 51.3 degrees.  While the ultimate velocity of an object thrown upward will be zero, the final velocity of an object thrown downward will be twice as fast as the initial velocity. Due to the forces of gravity, when an object is thrown both upward and downward with the same initial velocity, the ultimate velocities will differ. The object thrown upward will have a negative ultimate velocity, while the thing thrown downhill will have a positive end velocity.

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Answer: Heating from the crust and mantle.

Explanation: Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth's crust.

The convection currents that cause this cycle to take place is driven by heating from the crust and mantle. Hence, option (a) is correct option.

A crucial idea that illustrates the changes between the three primary rock types is the "rock cycle" (metamorphic, igneous and sedimentary). Simply put, it is a series of processes that create and modify the various types of rocks found in the Earth's crust.

The solid crust of Earth serves as a heat insulator for the planet's warm interior. The molten rock in the mantle, below the crust, is known as magma. Convection currents are created by the intense heat and pressure that exists within the earth. The tectonic plates that make up the earth's crust shift as a result of these currents.

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The unusually bright centers found in some galaxies are called "active galactic nuclei" (AGN).

These centers are characterized by their extreme brightness, which is due to the intense emission of energy across the electromagnetic spectrum, from radio waves to X-rays. The source of this energy is believed to be the accretion of mass onto supermassive black holes at the heart of these galaxies. When the matter surrounding the black hole is drawn towards it, it forms an accretion disk, which heats up due to friction and emits radiation. The emitted radiation can be so powerful that it outshines the entire galaxy, making the AGN easily observable from great distances. Examples of galaxies with active galactic nuclei include quasars, blazars, and Seyfert galaxies.

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The force exerted by the object having a mass of 5 kg is 10.79 N

The mass of the object, m = 5 kg

The velocity of the object from rest, v = 47.5 m/s

The time taken, t = 22 s

The formula to find the force exerted on the object is

              F = ma

where m is the mass of the object

           a is the acceleration of the object

But we know that

          a = v/t

where v is the velocity of the object

           t is the time taken

So, let us substitute the equation of the acceleration in the force equation, we get

          F = mv/t

Now, let us substitute the known values in the above equation,

        F = 5 x 47.5 / 22

           = 237.5 / 22

           = 10.79

Therefore, the force exerted by the object is 10.79 N

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Samuel and David are in the weight room bench pressing the same 900 N weight. If David has longer arms than Samuel, then David does more work on the weight while bench pressing.

This is referred to as the energy transferred to or from an object via the application of force along a displacement. It is calculated by the following below and the unit is in Joules.

Work = F × s  where f is force and s is displacement.

People who have longer arm spans will have a greater total distance to push the bar in order to reach the 120 degrees angle of elbow flexion. This means that there will be more work done in this scenario and is therefore the reason why David does more work on the weight while bench pressing and is therefore the reason why it was chosen as the correct choice.

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Answer:

mass of water = 98.44 - 35.00 = 63.44g

water has a density of 1000g/L

Volume of bottle = 63.44/1000 = .06344L

mass of other liquid = 88.78-35 = 53.78g

density of other liquid = 53.78g/0.06344L = 847.73g/L

Since water has a specific gravity of 1, set up a relation 1000/847.73 =1/sg

sg=.85

According to the question the induced emf in the inductor is 76,400 V

An inductor is an electrical component that stores energy in the form of a magnetic field. It is made up of a coil of wire usually with a ferromagnetic core, although the core can sometimes be air. When current passes through the coil, it creates a magnetic field, which stores energy in the form of a magnetic field. Inductors are used in many electronic circuits, such as filters, oscillators, transformers and voltage regulators. They can also be used to create and store a voltage in a capacitive circuit.

The induced emf in an inductor is given by the equation:
e = L*(di/dt)
where L is the inductance and di/dt is the rate of change of current.
In this case, the rate of change of current is calculated by taking the initial current, subtracting the final current (which is zero after the switch is opened) and dividing by the time interval (1.0 ms).
Therefore, the induced emf in the inductor is:
e = 22 H * (3.4 A / 0.001 s) = 76,400 V.

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The collisions that are considered inelastic are the ball of clay dropped onto the floor (clay sticks to the floor) and the bullet colliding with a block of wood (bullet embedded in the wood).

The collision of a golf club hitting a golf ball and the rubber ball dropped onto the floor are not specified as inelastic in the given options.An inelastic collision is one in which kinetic energy is not conserved, meaning that the total kinetic energy of the system before the collision is different from the total kinetic energy after the collision. In the case of the ball of clay dropped onto the floor, the clay sticks to the floor, resulting in a loss of kinetic energy and deformation of the clay, indicating an inelastic collision.

Similarly, when a bullet collides with a block of wood and gets embedded, there is a loss of kinetic energy and deformation, indicating an inelastic collision. On the other hand, the golf club hitting a golf ball and the rubber ball dropped onto the floor do not provide sufficient information to determine if the collisions are specifically inelastic.

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Answer:

A waiter

Explanation:

Specialization is the process of concentrating on and becoming an expert in a particular subject or skill. It can also be used to refer to the area on which someone becomes an expert. All the other options require years of gradual learning that builds up over the years for one to be considered an expert, asides for that of  a "waiter"

Waiting does not require much training, and cannot be referred to as an area of specialization.

Answer:

student

Explanation:

it's the only one that is not an example of specialization.

Answer:

An unbalanced force can change an object's motion. An unbalanced force acting on a still object could make the object start moving. An unbalanced force acting on a moving object could make the object change direction, change speed, or stop moving

Explanation:

hope this helps :)

Stress reversal is one of the most significant factors affecting the lifetime of mild steel. When stress is applied to a metal, the magnitude of that stress can vary from point to point on the material's surface. The stress state on the material may be changed by the magnitude of the applied stress, and this may have an impact on the lifetime of mild steel.

The effect of stress magnitude (reversal) on lifetime of mild steel can be plotted as follows: An S-N curve, also known as a Wohler curve, depicts the effect of stress range (reversal) on material life in a plot of stress (S) against the number of cycles to failure (N).Lifetime versus stress reversal or magnitude is shown on this graph. The magnitude of the cyclic stress that the steel undergoes has an effect on the lifetime of mild steel.A plot of the effect of stress magnitude (reversal) on the lifetime of mild steel will resemble an S-N curve. The lifetime of mild steel decreases as the magnitude of the cyclic stress increases or the number of reversals increases.The below is a graph depicting the effect of stress range (reversal) on the lifetime of mild steel. \(\Delta \sigma\) is the stress range, and N is the number of cycles. As the stress range increases, the number of cycles decreases, indicating a shorter life for the material. \(\sigma_a\) is the mean stress. \(\sigma_f\) is the fatigue strength, and it is the stress level at which failure will occur after an infinite number of cycles. The plot is called an S-N or Wohler curve.

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1. Astronomical observational patterns are used to determine the history of the universe by studying the light emitted or absorbed by celestial objects. Scientists analyze the patterns in the electromagnetic spectrum, such as the distribution of wavelengths, intensity, and spectral lines, to gather information about the composition, temperature, motion, and evolution of celestial bodies.

Astronomical observational refers to the act of observing celestial objects and phenomena in the field of astronomy. It involves the use of telescopes, detectors, and other instruments to collect data and study various aspects of the universe.

2. Mount Wilson and Mount Palomar Observatories were used to observe and collect data about space due to several reasons. Firstly, the locations of these observatories provide advantages for astronomical observations.

3. The NASA Mission Statement is: "To pioneer the future in space exploration, scientific discovery, and aeronautics research." This mission statement reflects NASA's commitment to advancing human knowledge, technological innovation, and exploration beyond Earth's boundaries. NASA aims to push the boundaries of scientific understanding, develop and test new technologies, explore the cosmos, and inspire the next generation of scientists and engineers.

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F=ma

Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration. We use Newtons, kilograms, and meters per second squared as our default units, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour per second, millimeters per second2, etc.) could certainly be used as well - the calculation is the same regardless.

The statements which are correct about calculating LaToya's mechanical advantage are—The input force is 50 N, the output force is 450 N and the mechanical advantage is 10.Therefore, the correct option is A, D and E.

Mechanical advantage is the ratio of output force to input force. In this case, LaToya is using a force of 50 N to pull a cart that weighs 500 N. The output force is the weight of the cart minus the force LaToya exerts on it:

Output force = 500 N- 50 N = 450 N

To see why statement F is incorrect, note that the formula for mechanical advantage is:

Mechanical advantage = output force / input force

Substituting the values we found earlier, we get:

Mechanical advantage = 450 N / 50 N = 9

So the mechanical advantage is actually 9, not 100.

Therefore, the correct option is A, D and E.

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Answer:

The magnetic field is   \(B = 3 mT\)

Explanation:

From the question we are told that

     The inner radius is  \(r_i = 1.00 mm =1*10^{-3} \ m\)

      The outer radius is  \(r_2 = 3.00 \ mm = 3.0 *10^{-3} \ m\)

       The distance from the axis of the conductor is \(d =2.0 \ mm = 2.0 *10^{-3} \ m\)

      The current carried by the conductor is  \(I = 80 A\)

According to Ampere's circuital law , the magnetic field at a point that is  \(r_3\)  from the axis of the conductor

                  \(B = \frac{\mu_oI}{2 \pi d } [\frac{d - r_1}{r_2 -r_1} ]\)

Where \(\mu_o\) is the permeability of free space with a value of \(\mu_o = 4 \pi *10^{-7} N/A^2\)

substituting values

                  \(B = \frac{(4 \pi *10^{-7})(80)}{2 * 3.142 * 2 *10^{=3} } [\frac{(2^2 - 1 ^2 )*10^{-3}}{(3^2 - 1^2) *10^{-3}} ]\)

                 \(B = 3 mT\)

Answer:

When the  water is frozen it turns to ice and the density decreases.

Explanation:

Have A Wonderful Day !!

Explanation:

(1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1÷1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 )

The net flux through an insulating cube of side a, with a charge of q distributed uniformly throughout it, is determined by the ratio of q to the permittivity of free space.

The net flux through an insulating cube of side a, with a charge of q distributed uniformly throughout it, can be determined using the formula for electric flux: Φ = q/ε0. In this case, q is the charge of the cube and ε0 is the permittivity of free space, a universal constant (8.85x10-12 C2/N m2). The electric flux through the cube is therefore equal to q/(8.85x10-12 C2/N m2).
To put it more simply, the net flux is determined by the ratio between the charge and the permittivity of free space. The cube's side length has no impact on the flux because the charge is uniformly distributed throughout it. Therefore, the net flux will be the same, regardless of the size of the cube.

To summarize, the net flux through an insulating cube of side a, with a charge of q distributed uniformly throughout it, is determined by the ratio of q to the permittivity of free space. The side length of the cube does not affect the flux.

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By the processes of heat transfer, the sidewalk absorbs heat by radiation and cooks the egg.

Heat energy is a form of energy that is due to difference in temperature between two bodies.

Heat energy always flow from hotter to colder bodies

The processes of heat transfer include;

The sidewalk absorbs heat by radiation and cooks the egg.

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Answer:

absorption

Explanation:

The process that causes water to move from Earth's surface to the atmosphere during the water cycle is called evaporation.

Evaporation is the process by which water molecules absorb energy from the surrounding environment, typically in the form of heat, and transform from a liquid state to a gaseous state (water vapor). The water molecules then rise up into the atmosphere, where they can form clouds and participate in other processes in the water cycle, such as condensation, precipitation, and surface runoff. Evaporation occurs primarily from bodies of water, such as oceans, lakes, and rivers, but also from soil, plants, and other surfaces that contain moisture.

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Answer: Force

In physical science, a force is something that acts on an object by pushing or pulling it. If the force is strong enough, it changes the position or shape of the object. Forces such as friction, air resistance and simple physical contact touch the object directly, while forces like gravity, magnetism and electrostatics act on the object from a distance. Force is a vector quantity, meaning you can measure both its strength and its direction. The formula to find the measure of a force is force = mass times acceleration, written as f = ma.

Velocity

The faster something is moving, the higher its velocity.

When an object is moving, one way to measure how fast it is moving is by finding its velocity, which is the rate at which it is changing position. Like force, velocity is a vector quantity, so it includes direction. To find the average velocity of an object, divide the change in its position by the time the movement took, and state its direction. For example, if a car is driving north and in one hour's time it travels 30 miles, its velocity is 30 miles per hour, north.

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Answer:

800W

Explanation:

48,000/60=800

The power rating of the hairdryer is 800W.

Power can be defined as the rate at which work is done by an object. The S.I unit of power is Watt(W).

The formula of power will be

Power = Work done/time

A hair dryer transfers 48K J of energy in one minute.

1 minute = 60 seconds

P = 48,000/60

P = 800 W

Hence, the power rating of the hairdryer is 800W.

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