find the current in an 8.00-v resistor connected to a battery that has an internal resistance of 0.15 v if the voltage across the battery (the terminal voltage) is 9.00 v. (b) what is the emf of the battery?

The given unbalanced equation is:Al2(SO4)3 + Ca(OH)2 → Al(OH)3 + CaSO4

Chemical equations are balanced by adjusting the coefficients of the molecules on either side of the equation. To balance the equation, the same number of atoms should be present on both sides. To balance a chemical equation, the coefficient should be a whole number. The balanced equation should have the lowest common multiple coefficients for the molecules. Balancing the equation helps to understand the relationship between the reactants and the products involved in the chemical reaction.

To balance the above chemical equation, the coefficients should be added to the molecules on the left and right of the equation in order to have the same number of atoms on both sides. And the balanced chemical equation would look like this:

Al2(SO4)3 + 3 Ca(OH)2 → 2 Al(OH)3 + 3 CaSO4

In the balanced chemical equation, the coefficient in front of the CaSO4 is 3.

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The minimum angular velocity (in rpm) for swinging a bucket of water in a vertical circle without spilling any is 5.56 rpm.

The minimum angular velocity (in rpm) for swinging a bucket of water in a vertical circle without spilling any is given by the formula; Vmin=√g/R

where:

To express the answer in revolutions per minute, the radius of the circle must be converted to meters;R = 35 cm = 0.35 m

Substituting the values given above into the formula;

Therefore, the minimum angular velocity (in rpm) for swinging a bucket of water in a vertical circle without spilling any is 5.56 rpm.

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The object will decelerate over time, as the net force acting on it decreases. This is because the net force is the vector sum of all forces acting on the object.

When an object is moving to the right in a straight line, and the net force acting on the object is also directed to the right, it means that there is no opposing force to halt its motion.

Therefore, the object will continue to move to the right in a straight line with constant speed since there is no change in the magnitude of the net force.

However, when the net force is directed to the right and is decreasing with time, the object's motion will be altered. The magnitude of the force is decreasing with time, so there will be less force acting on the object.

The force acting on the object is decreasing with time; thus, the object's acceleration will be less than before. As a result, the velocity of the object will decrease with time. Since there is no force opposing the motion, the object will continue to move to the right but with decreasing speed due to the decrease in net force acting on it.

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Answer:

The original mass of the substance was 10g.

Explanation:

The half-life of a radioactive substance is the amount of time it takes for half of the substance to decay. In this case, the half-life is 5 hours.

We can use the half-life formula to find the original mass of the substance:

N = N0 * (1/2)^(t/T)

where:

---N0 is the initial mass of the substance

---N is the remaining mass of the substance after time t

---T is the half-life of the substance

We know that after 20 hours, only half of the substance remains:

N = N0 * (1/2)^(20/5) = 0.5 * N0

If we solve for N0, we get:

N0 = N / 0.5 = 5g / 0.5 = 10g

Therefore, the original mass of the substance was 10g.

Therefore, the speed of the test charge when it reaches the center of the square is 50.14 m/s

To find the speed of the test charge when it reaches the center of the square, use conservation of energy. The initial potential energy (PE) of the test charge is 0 as it is released from rest. The total energy (E) of the test charge is conserved as it moves towards the center of the square. Therefore, the initial kinetic energy (KE) of the test charge must equal the PE of the test charge when it reaches the center of the square.

The PE of the test charge at the center of the square is the sum of the electrostatic potential energy between the test charge and the two point charges, which is given by:

PE = (q0)(q1)/(4πɛ0L) + (q0)(q2)/(4πɛ0L)

Where L is the length of the side of the square and q1 and q2 are the charges of the two point charges.

We can then calculate the initial Kinetic energy of the test charge using the formula:

KE = 1/2mv2

Where m is the mass of the test charge and v is the speed of the test charge. We can equate the PE and KE to find the speed of the test charge:

KE = PE

1/2mv2 = (q0)(q1)/(4πɛ0L) + (q0)(q2)/(4πɛ0L)

v2 = 2(q0)(q1)/(m4πɛ0L) + 2(q0)(q2)/(m4πɛ0L)

v = √(2(q0)(q1)/(m4πɛ0L) + 2(q0)(q2)/(m4πɛ0L))

Substituting the values given in the question, we get:

v = √(2(2.40 x 108 C)(7.20 x 106 C)/(6.60 x 108 kg x 4π x 8.85 x 10-12 C2/Nm2 x 0.480 m) + 2(2.40 x 108 C)(7.20 x 106 C)/(6.60 x 108 kg x 4π x 8.85 x 10-12 C2/Nm2 x 0.480 m))

v = 50.14 m/s

Therefore, the speed of the test charge when it reaches the center of the square is 50.14 m/s.

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The effective current associated with an electron in the lowest energy state of the hydrogen atom in the Bohr model is 6.63×10-7 A.

To calculate the effective current, we can use the formula:

I = qv/T

where I is the effective current, q is the charge of the electron, v is its velocity, and T is the time period of its circular orbit.

In the lowest energy state of the hydrogen atom, the electron is in a circular orbit with a radius of 5.29×1011 m and a speed of 2.19×106 m/s. The time period of the orbit can be calculated using the formula for centripetal acceleration:

a = v^2/r

F = ma = (mv^2)/r

F = kQq/r^2

mv^2/r = kQq/r^2

T = 2pir/v

where F is the electrostatic force between the electron and the proton in the nucleus, k is Coulomb's constant, Q is the charge of the nucleus, q is the charge of the electron, m is the mass of the electron, and r is the radius of the orbit.

Substituting the given values, we get:

T = 2pi(5.29×10^(-11) m)/(2.19×10^6 m/s) = 2.42×10^(-16) s

Using the charge of an electron, q = -1.6×10^(-19) C, and the velocity calculated above, we get:

I = qv/T = (-1.6×10^(-19) C)(2.19×10^6 m/s)/(2.42×10^(-16) s) = -6.63×10^(-7) A

The negative sign indicates that the effective current is in the opposite direction of the electron's motion.

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When a resistor is connected to a battery with a lower voltage, the amount of current flowing through it would decrease.

R is the resistance applied through the 6 volt cell. We obtain by replacing values. As a result, the potential difference across the 6V cell is 8.4 V. The voltage is the difference in potential between two sites in an electric field. In an electric field, the current is the movement of charges between two sites.

According to Ohm's Law

I = V/R

The current flowing through a 200 ohm resistor attached to a 12 V automotive battery is:

I = V/R

= 12 V / 200 ohms

= 0.06 A

Applying Ohm's Law once more, the new current would be:

I = V/R

= 6 V / 200 ohms

= 0.03 A

Therefore, When a resistor is connected to a battery with a lower voltage, the amount of current flowing through it would decrease.

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The applied force for the engine will be 24,450 N.

The applied force produced by the engine for a car weighing 12,500 n starting from rest and accelerating to 83.0 km/h in 5.00 s with a friction force of 1350 n is:

Applied force = (Mass x Acceleration) - Friction force

Applied force = (12,500 N x (83.0 km/h / 5.00 s)) - 1350 N

Applied force = 25,800 - 1350 N

Applied force = 24,450 N

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The required potential energy stored in the spring-block system, when the second block is placed on the surface and the spring is compressed by twice the distance, is four times the original potential energy Em.

Let's denote the original potential energy when the spring is compressed by distance d as Em. When the spring is compressed, it exerts a restoring force given by Hooke's Law:

F = -kx,

Where F is the restoring force, k is the spring constant, and x is the displacement from the equilibrium position.

When the spring is compressed by distance d, the potential energy stored in the system is given by:

[tex]E_m = \dfrac{1}{2} kd^2[/tex]

Now, let's consider the situation when the second block of mass 2m is placed on the surface, and the spring is compressed by a distance 2d. Since the spring is compressed by twice the distance, the displacement is 2d. In this case, the potential energy stored in the system can be calculated as:

[tex]E_2 = \dfrac{1}{2} k((2d)^2) \\E_2= 4\times \dfrac{1}{2}k(d^2) \\E_2= 4E_m[/tex]

Therefore, the potential energy stored is four times the original potential energy Em.

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Answer:

Horizontal-axis (HAWT) pros

Cons

Vertical-axis (VAWT) pros

Cons

Yes, it is possible for an object to be moving with a constant velocity even when force is exerted on the object. When an object is in a state of rest, a force is required to move it from that position.

Newton’s second law states that the acceleration of an object is directly proportional to the force exerted on it and inversely proportional to its mass. Thus, a larger force results in a greater acceleration of the object. If there is no force applied to the object, the object will remain stationary or move at a constant velocity.

However, if there is a force applied to the object, it will accelerate. If the force applied is balanced by an equal and opposite force, the object will continue to move with a constant velocity. An object in motion is said to be in equilibrium when the net force acting on the object is zero. When the net force acting on an object is zero, it moves at a constant velocity. Therefore, if a force is exerted on an object, it is possible for the object to be moving with a constant velocity if the forces are balanced.

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The  correct option iD. Sand 20% Clay 20% Silt 60% best approximates the percentages of sand, clay, and silt in a silty loam.

Soil texture is the roughness or softness of soil or soil particles. Soil texture can either be smooth/soft or rough soil texture. The soil texture table helps to determine the percentages of sand, clay, and silt in a silty loam. Among the given options, the best approximation for the percentages of sand, clay, and silt in a silty loam is 20% sand, 60% silt, and 20% clay. Therefore, the correct option for the question is option D. Sand 20% Clay 20% Silt 60%So, this is the answer to your question.

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When five vectors are added tail-to-tip and they end up where they started from, the magnitude and direction of R are zero.

What are vectors?

A vector is a quantity that has a magnitude (or length) and direction. It is typically represented by an arrow, with the length of the arrow representing the magnitude of the vector and the arrowhead indicating the direction in which the vector points. Vectors can be added or subtracted to create new vectors.

When vectors are added, they must be placed head-to-tail or tail-to-tip. In other words, the tail of one vector must be placed at the head of the previous vector to create a chain. The resulting vector is called the resultant vector and can be found by drawing a straight line from the tail of the first vector to the head of the final vector.

The magnitude of a vector is the length of the arrow that represents the vector. It is typically represented by the letter "R". So when five vectors are added tail-to-tip and they end up where they started from, the magnitude and direction of R are zero.

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The appropriate visual analogies that correspond to the given scenarios are as follows:

A) The car traveling in a circle and the rain falling from the sky - this analogy corresponds to the Earth moving around the Sun and interacting with light from a distant star.

B) The car traveling in a straight line and the rain falling from the sky - this analogy corresponds to a person on the moving Earth observing the light from a distant star.

C) The car is stationary and the rain falls from the sky - this analogy corresponds to a person on a motionless Earth observing the light from a distant star.

As we know that the direction of the earth's motion around the sun continually changes during the year, and the apparent position of a star in the sky moves in a small loop, known as the aberration of starlight. Hence, the visual analogies that correspond to the given scenarios are as follows:'=

a) The Earth moving around the Sun and interacting with light from a distant star is analogous to the first picture, where the car is moving and it is raining. This visual analogy explains that when the Earth moves around the Sun and interacts with light from a distant star, it results in a small loop of light in the sky.

b) A person on the moving Earth observing the light from a distant star is analogous to the second picture, where a person is sitting inside the moving car and looking at the rain. This visual analogy explains that when a person is on the moving Earth and observes the light from a distant star, it creates an illusion in the sky.

c) A person on a motionless Earth observing the light from a distant star is analogous to the third picture, where a person is standing outside the car and looking at the rain. This visual analogy explains that when a person is on a motionless Earth and observes the light from a distant star, it appears as if the star is moving in a small loop in the sky.

Therefore, the appropriate visual analogies that correspond to the given scenarios are as follows: Image 1: The Earth moving around the Sun and interacting with light from a distant star image 2: A person on the moving Earth observing the light from a distant star image 3: A person on a motionless Earth observing the light from a distant star.

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It will take approximately 1.67 seconds for the car to go from a speed of 20.0 m/s to a speed of 25.0 m/s if the acceleration is 3.0 m/s².

[tex]v = u + at[/tex]

Given:

u = 20.0 m/s (initial velocity)

v = 25.0 m/s (final velocity)

a = 3.0 m/s² (acceleration)

Rearranging the equation, we get:

[tex]t= \frac{(v - u)}{a}[/tex]

Substituting the given values:

t =  [tex]\frac{(25.0 m/s - 20.0 m/s)}{3.0 m/s^{2} }[/tex]

t = 1.67 s

Speed is the measure of the rate at which an object moves. It is defined as the distance an object travels per unit of time. Speed is a scalar quantity and is expressed in units of distance per unit of time, such as meters per second (m/s) or kilometers per hour (km/h). It is important to note that speed does not tell us anything about the direction of motion or any changes in direction. This is where velocity comes in, which is a vector quantity that includes both speed and direction.

Speed can be either average or instantaneous. Average speed is the total distance traveled divided by the total time taken, while instantaneous speed is the speed at a particular instant in time. Speed can also be described in terms of velocity, which includes direction as well as magnitude.

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The given statement "Small aperture phone aperture stop doubly-telecentric full control over the light collection uniform across the entire field of view. Furthermore it would allow resolution to be uniform across the same field of view" is False.

Aperture refers to the opening in a camera lens that regulates the amount of light that enters a camera. The camera aperture is determined by the size of the lens opening, which may be adjusted using a ring on the lens. The smaller the opening, the larger the f-number, which reduces the amount of light entering the camera.

Resolution refers to the ability of a lens to capture an image in detail. The resolution of an image is measured in pixels, and it is directly proportional to the number of pixels in the image. The resolution of an image is determined by the size of the camera sensor, the pixel density, and the quality of the lens.

Doubly telecentric lenses are those that have a telecentric entrance pupil, a telecentric exit pupil, or both. The telecentric entrance pupil implies that the aperture stop is located at the entrance pupil's location. The telecentric exit pupil implies that the pupil is located at the aperture stop's location. The doubly telecentric means that both the entrance and exit pupils are at the same location. As a result, the lens is able to provide sharp images with uniform resolution across the entire field of view.

The given statement, "Small aperture phone aperture stop doubly-telecentric full control over the light collection uniform across the entire field of view. Furthermore it would allow resolution to be uniform across the same field of view" is False.

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Answer: Energy is the ability to do work.

Joules is what energy is measured in.

Kinetic energy is the energy which a body possesses by virtue of being in motion.

Potential energy is the energy held by an object because of its position relative to other objects, stresses, within itself, its electric charge, or other factors.

Explanation:

Answer: The force produced by piston B is 0.006 N.

Explanation:

No problem! We can convert the area of piston B to square meters to make the units consistent:

Area of piston B = 0.1 cm^2 = 0.1 x (0.01 m/cm)^2 = 0.00001 m^2

Now we can use the formula:

pressure = force/area

For piston A, we have:

pressure = 6 N / 0.01 m^2 = 600 Pa

So the pressure in the liquid is 600 Pa.

To find the force produced by piston B, we rearrange the formula:

force = pressure x area

Using the pressure we just found and the area of piston B, we get:

force = 600 Pa x 0.00001 m^2 = 0.006 N

So the force produced by piston B is 0.006 N.

Terrestrial planets are those within our Solar System composed of silicate rocks or metals, while Jovian planets are gas giants composed mainly of hydrogen and helium.

Terrestrial Planets:

- Small size
- High density
- Rocky or metallic composition
- Solid surfaces

Jovian Planets:

- Large size
- Low density
- Gas and liquid composition
- No solid surfaces

The four terrestrial planets in our Solar System are Mercury, Venus, Earth, and Mars. They have small sizes and high densities, and are composed mainly of silicate rocks or metals, with solid surfaces.

The four jovian planets are Jupiter, Saturn, Uranus, and Neptune. They have large sizes and low densities, and are composed mainly of hydrogen and helium gas and liquid. They do not have solid surfaces.

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Complete question:

identify a planet as either terrestrial or jovian. Match the planet  to the appropriate category. Consider only the planets of our own solar system.

The closest answer among the options given is 3.9 x 105 J. . An object can accelerate by increasing its speed, changing its direction, or both.

What is Acceleration?
Acceleration is the rate of change of velocity of an object over time. It is a vector quantity, meaning it has both magnitude and direction, and is expressed in units of meters per second squared (m/s^2) or feet per second squared (ft/s^2)

The work done to accelerate the car can be calculated using the kinetic energy formula:

K = 1/2 mv^2

Substituting the given values, we get:

K = 1/2 (1600 kg) (22 m/s)^2

K = 677,600 J

Therefore, the work done to accelerate the car to this speed is 677,600 J.

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According to the given figure, we can observe that a rod of length L with total charge Q is there. We need to find the expression for the electric field strength at point P on the axis of the rod at distance R from the center.

The electric field strength at point P on the axis of the rod at distance R from the center is given by:

[tex]E= KQ/(R^{2}+(L/2)^{2})^{3/2}[/tex]

Where, k is Coulomb's constant, Q is the total charge on the rod, L is the length of the rod, R is the distance between the point P and the center of the rod.

The derivation is given below.

Consider a thin rod with length L and total charge Q.

The linear charge density λ is given by:

λ = Q/L

Consider a small element of length dx at a distance x from the center of the rod. The electric field due to this small element is given by:

dE = kλdx/[tex]x^{2}[/tex]

Using Pythagoras theorem, we have:

[tex](R^{2}+(x-L/2)^{2} =z^{2}[/tex]

Thus, z = sqrt(R2+(x-L/2)2)

The electric field due to this small element is given by:

dE = kλdx/[tex]z^{3}[/tex]dE = kλdx/([tex]R^{2}[/tex]+[tex](x-L/2)^{2}[/tex])3/2

The total electric field is obtained by integrating the electric field due to all the small elements from -L/2 to L/2.

E =  ∫ dE from -L/2 to L/2

E = ∫kλdx/([tex]R^{2}[/tex]+[tex](x-L/2)^{2}[/tex])3/2 from -L/2 to L/2

E = kQ/[tex](R^{2} +(L/2)^{2})^{3/2}[/tex]

Therefore, the expression for the electric field strength at point P on the axis of the rod at distance R from the center is given by:

E = kQ/[tex]((R^2+(L/2)^2)^{3/2} )[/tex].

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The waves of which wavelength would have the hardest time diffracting through the doorway into the room is 100 meters. The correct answer is Option C.

Diffraction is the spreading of waves when they pass through a gap or go around the edge of an obstacle. Diffraction occurs when a wavefront interacts with an obstacle, such as a gap or edge, and the wavefront bends around it or spreads out. This occurs for any wave, such as light waves or sound waves, and may be observed in various natural and everyday occurrences.

Diffraction of waves:

It is directly proportional to the wavelength and inversely proportional to the size of the obstacle. When the width of an obstacle is similar to the wavelength of the wave, the amount of diffraction is the highest.

Wavelength, also known as lambda, is a concept in physics that refers to the distance between two adjacent peaks or troughs of a wave. It is usually given the symbol λ and is measured in meters. The distance between two wave crests or troughs is the wavelength of a wave. Waves of varying wavelengths are present in our environment. Waves with shorter wavelengths, such as gamma rays, X-rays, and UV radiation, are high in energy but have a low range, while waves with longer wavelengths, such as radio waves and microwaves, are low in energy but have a longer range.

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Answer:

Explanation:

no

1.) The rider's apparent weight during the launch (launched skyward with an acceleration of 4g, after which they experience a period of free fall) = 2400 N

2.) The rider's apparent weight during the period of free fall = zero / 0

The Power Tower ride is an amusement ride that launches passengers high up in the air before letting them freefall down towards the ground. The ride's name is derived from the tower structure, which is used to store the ride's energy before propelling passengers skyward. After a brief period of freefall, the ride decelerates passengers and gently lowers them back to the ground. The ride is designed to provide a thrilling experience while maintaining passenger safety.

For the Power Tower ride, a 60 kg rider's apparent weight is 2400 N during the launch:

(4g x 60 kg x 9.8 m/s²

= 2400 N

And it is zero during the free fall period (due to the absence of a supporting force).

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To determine each property in the three bins, certain items must be measured. The luminosity, surface temperature, and mass are the three important properties of the stars represented by three bins.

The measurement for each property is as follows:

For luminosity: To measure luminosity, we must measure the total amount of energy a star emits in all wavelengths.

For surface temperature: Surface temperature is determined by analyzing the spectrum of light emitted by the star.

The spectrum shows a rainbow of colors, and some colors will be more intense than others. These colors can be used to estimate the temperature of the star's surface.

For mass: Mass is calculated using observations of how the star interacts with its surroundings. Astronomers observe the gravitational effect that a star has on other objects around it. The mass of a star can be estimated using this method.

Stars are gigantic balls of burning gas that light up the sky and heat up planets around them. The sun is a star, for example.

Some stars are smaller and some are larger, but all of them share the same basic structure. The enormous nuclear furnace at the center of every star produces heat and light through fusion.

Stars are made up of mostly hydrogen and helium, but they contain small amounts of other elements. They are classified into three categories based on their luminosity, surface temperature, and mass.

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All but  option A: the plant is exposed to light condition must be present for the Calvin cycle reactions to occur.

The Calvin cycle is the biochemical process that takes place in the chloroplasts of plants, in which carbon dioxide is fixed into glucose molecules. This process involves several enzymes and molecules, but the energy needed to power the process comes from ATP and NADPH, which are produced during the light-dependent reactions that take place in the thylakoid membranes of the chloroplasts.

Therefore, light is required for the Calvin cycle to occur since it is the source of the energy that drives the reaction. However, all parts of the plant do not need to be exposed to light for the Calvin cycle to occur. Only the chloroplasts, which are found in the mesophyll cells of the plant, need to be exposed to light for photosynthesis to occur.

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See full question below

all but which condition must be present for the calvin cycle reactions to occur?

The plant is exposed to light

water is not involved in any of the reactions

light energy is converted into chemical energy

provide the electrons needed to reduce NADP

In a three battery combination whose second resistor is opposite in polarity of the other two, the Σε and Σr are 24 V and 14 Ω respectively.

Begin by finding the equivalent voltage and resistance of the circuit:

Since ε₂ is in the opposite direction, subtract it from the other two voltages:

∑ε = ε₁ + ε₃ - ε₂ = 12 V + 18 V - 6 V = 24 V

To find the equivalent resistance, first combine the 6 Ω and 12 Ω resistors in parallel:

1/Rp = 1/6 Ω + 1/12 Ω = 1/4 Ω

Rp = 4 Ω

Then combine the 4 Ω resistor in series with the 10 Ω resistor:

R = 4 Ω + 10 Ω = 14 Ω

Therefore, ∑ε = 24 V and ∑r = 14 Ω.

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The power delivered by the person who applied a force of 10N to a box and pushed it 10 m in 10 s = 10 W

To determine the power delivered by the person who applied a force of 10N to a box and pushed it 10m in 10s can be determined by the formula,

P = W/t

Where

P denotes power,

W denotes work, and

t denotes time.

Therefore, power is given by the formula:

P = W/t = (F × s) / t

Here, F = 10 N (applied force)s

= 10 m (displacement)

t = 10 s (time taken)

Hence,

P = (10 N × 10 m) / 10 s

= 10N m / s

= 10 W

Therefore, the power delivered by the person who applied a force of 10N to a box and pushed it 10m in 10s is 10 W.

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When the ball is initially dropped, it is accelerated downward by gravitational force.

When the ball is released, it has potential energy that is transformed into kinetic energy as it accelerates downwards under the gravitational force.

At the moment the ball hits the ground, the kinetic energy is converted into elastic potential energy due to the compression of the ball's material.

As a result of this compression, the ball's motion is reversed, and the elastic potential energy is converted back into kinetic energy, which causes the ball to rise again.

This process of energy transformation continues until the ball reaches its maximum height, where its kinetic energy has been transformed back into potential energy.

Overall, the gravitational force plays a critical role in this process by providing the initial acceleration that allows the ball to fall toward the ground. Without this force, the ball would remain stationary in the air, unable to move in any direction.

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