Yusef is doing an experiment to find out how the amount of sunlight affects the growth of a seedling. He has three identical pots containing grass seeds that he planted at the same time. He puts them in windows that receive different amounts of sunlight each day. Every day, Yusef looks at the pots and records his observations. What is the variable in Yusef's experiment? A. amount of water B. type of seedling C. type of soil D. amount of sunlight

The force exerted by the first object on a second object is known as the action force, a part of Newton's Third Law of Motion, which states that equal and opposite forces are exerted on both objects involved in an interaction.

The name given to the force exerted by the first object on a second object is generally referred to as the "action" force. This is a part of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. This law means that whenever one body exerts a force on a second body, the second body simultaneously exerts a force that is equal in strength and opposite in direction to that of the first body.

This concept is significant because it underlines the symmetry of forces in nature. When object A exerts a force on object B, object B exerts a force back on object A. These forces are equal in magnitude but opposite in direction, reflecting Newton's Third Law which is often informally referred to as the law of action and reaction.

The hammer pounding a nail demonstrates Newton's First Law, as the hammer's horizontal motion stops due to the opposing force of the nail and board, and Newton's Third Law, with the nail applying an equal and opposite force to the hammer.

The phenomenon of a hammer pounding a nail into a board can be analyzed using Newton's laws of motion. Specifically, two of these laws are demonstrated:

Newton's First Law (also known as the law of inertia). This law suggests that if an object is in motion, it will not change its velocity unless a force acts upon it. For example, a hammer in motion strikes a nail and is brought to rest because the nail and board apply a force opposing the hammer's motion.

Newton's Third Law states that for every action, there is an equal and opposite reaction. Therefore, as the hammer applies a force to drive the nail into the board, the nail applies an equal and opposite force to the hammer, causing it to stop.

When a hammer hits a nail, the horizontal momentum of the hammer is reduced to zero as the nail stops the hammer—illustrating Newton's First Law. Simultaneously, the force with which the hammer strikes the nail and the nail’s force on the hammer (which is responsible for stopping the hammer) is an example of Newton's Third Law in action.

The illustration represents that the light ray striking the object is reflected. Hence, option (D) is correct.

The given problem is clear explanation for the reflection of light rays. The phenomena by which the rays of light strikes a surface bounce back exactly from the surface by making some angle with respect to normal, is known as reflection of light ray.

In the given figure, we can clearly observe that the light ray is striking the vertical surface somewhere from the bottom, which is known as incident ray. When this ray strikes the surface it bounce back from the surface and we can observe the upward arrow to represent the reflected ray of light.

Thus, we can conclude that the illustration represents that the light ray striking the object is reflected. Hence, option (D) is correct.

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The speed of a wave with a frequency of 8,500 Hz and a wavelength of 1.5 m is calculated as 12,750 m/s by multiplying the frequency and wavelength together.

To calculate the speed of a wave, we can use the formula v = f × λ, where v is the speed of the wave, f is the frequency, and λ (lambda) is the wavelength. Given that the frequency, f, is 8,500 Hz and the wavelength, λ, is 1.5 m, you can plug these values into the equation to determine the wave's speed.

Speed of the wave v = 8,500 Hz × 1.5 m = 12,750 m/s

So, the speed of the wave with a frequency of 8,500 Hz and a wavelength of 1.5 m is 12,750 meters per second (m/s).

The correct answer is D) refraction! Hope this helps!

Answer:

i think it is D, hope this helps

Answer:

Answer:

1. Fermi

2. Neutron

3. Fission

4. Atomic mass

5. Fusion

6. Becquerel

7. Curie

Explanation:

The loudness of a sound can be increased by increasing the amplitude of the sound wave. This can be achieved by adjusting the volume on a speaker or by using devices designed to amplify sound, like a vuvuzela. Also, sounds with higher amplitude and intensity, such as those from a loud car stereo, are naturally louder.

The loudness or volume of a sound wave can be increased by increasing its amplitude. The amplitude of a sound wave determines how much energy it carries, which directly affects its loudness. An example of this is how a speaker produces louder sounds: as you increase the volume on a speaker, it causes the table or surface it is on to vibrate more vigorously. This is because the speaker is moving more air (higher amplitude), which translates to a louder sound.

Another example is using a vuvuzela. The size and construction of the vuvuzela are designed to amplify the sound produced by the person blowing into it, making it louder. The amplified sound has a higher amplitude and therefore a louder volume.

Finally, in a real-life scenario, consider two sounds: one from a passing car's stereo and the other from the person next to you. The sound from the car's stereo is amplified due to its higher intensity and amplitude, making it louder and causing it to dominate over the sound coming from the person next to you.

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Answer:

Light energy is absorbed by plants and converted to chemical energy.

Explanation:

Explanation:

Thermal energy is defined as the kinetic energy present within the particles of a substance.

A process in which energy is absorbed by the molecules of a substance is known as endothermic process. On the other hand, a process in which energy is released by the molecules of a substance is known as exothermic process.

Condensation : A process in which vapors change into liquid as bonds are formed and energy is released.

Freezing : A process in which liquid changes into solid as bonds are formed and energy is released.

Deposition : A process in which particles of a substance come closer to each other resulting in bond formation and release of energy.

Sublimation : A process in which solid state directly changes into gaseous state without undergoing liquid state is known as sublimation. In this process, bonds break and energy is absorbed by the solid particles.

Evaporation : A process in which liquid changes into gas as energy is absorbed leading to breakage bond.

Melting : A process in which solid changes into liquid as energy is absorbed leading to breakage bond.

Thus, we can conclude that given processes are sorted as follows.

The best statement that represents the work is being done is A car being towed down a street.

The meaning of the work in terms of physics should represent the measurement of the energy transfer that arises at the time when the object should be moved over the distance via the external force also it should be applied at the displacement direction.

Therefore, The best statement that represents the work is being done is A car being towed down a street.

This question is incomplete. Please find the options below.

f A lamp hanging from a ceiling

g A rocket drifting through space

h A man pushing against a concrete wall

j A car being towed down a street

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Final answer:

Scientific work requires a force to cause an object's displacement in the direction of the force, and is calculated by the equation W = Fd cos θ. No work is done if there is no displacement or the force is perpendicular to the direction of displacement.

Explanation:

The scientific definition of work differs from everyday use. In physics, work requires that a force causes a displacement of an object, and the force must have a component in the direction of the displacement. This process implies a transfer of energy. To calculate work done (W) scientifically, you use the equation W = Fd cos θ, where F is the magnitude of the force applied, d is the displacement of the object, and θ is the angle between the force vector and the displacement vector. When there's no displacement or the force is perpendicular to the displacement, no work is done according to science.

For example, pushing against a wall would not be considered work in the scientific sense because the wall does not move—there's no displacement. However, lifting an object off the ground does constitute work as the direction of the force (upwards) is the same as the direction of the movement (also upwards), and the object is displaced from its initial position.

Answer:

Potential energy is the energy possessed by a body at rest while kinetic energy is the energy possessed by a body in motion.

Explanation:

Potential energy is the energy possessed by a body by virtue of its position while kinetic energy is the energy possessed by a body by virtue of its motion. Potential energy is the energy acting on a body at rest(not moving) while kinetic energy is the energy acting on moving object(motion).

Example of potential energy is the energy possessed by a parked car. The parked car is not moving i.e the car is in a state of rest

Example of kinetic energy is the energy possessed by an accelerating car. The car is in motion (moving).

The FIRST law states that an object at rest stays at rest, or if it's moving it continues at a consistent speed and direction unless acted on by another force. The SECOND law implies that the force needed to change an object's motion depends on its mass and the required acceleration. The THIRD law states that every force (action) has an equal and opposite force (reaction).

Newton's FIRST Law of Motion

An object at rest stays at rest, or an object that is moving at a consistent speed in a straight line keeps moving at that speed unless another force acts on it.

Newton's SECOND Law of Motion

The amount of force needed to make an object change its motion depends on the mass of the object and the acceleration required.

Newton's THIRD Law of Motion

For every action (or force), there is a(n) equal and opposite reaction (or force).

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Newton's Second Law of Motion which states that the acceleration an object experiences is directly proportional to the force applied to it

sound waves and light waves are both types of waves that exhibit similar behaviors such as reflection, refraction, and interference. However, they differ in their physical properties such as the medium they travel through, their speed, and their frequency.

Sound waves and light waves are both types of waves that propagate through a medium, but they have several differences in their physical properties and behaviors.

Physical Properties:

1. Medium: Sound waves require a medium to travel through, such as air, water, or solids. Light waves, on the other hand, can travel through a vacuum and do not require a medium.

2. Speed: Sound waves travel at a slower speed than light waves. The speed of sound waves depends on the density and compressibility of the medium through which they are traveling. In contrast, the speed of light waves is constant in a vacuum and is one of the fundamental constants of nature.

3. Frequency: Sound waves have lower frequencies than light waves. The frequency of a sound wave is the number of cycles per second, measured in hertz (Hz). Light waves have much higher frequencies, typically measured in terahertz (THz).

Behaviors:

1. Reflection: Both sound waves and light waves can reflect off surfaces. When a sound wave reflects off a surface, it changes direction, and the angle of incidence is equal to the angle of reflection. When a light wave reflects off a surface, it undergoes a change in direction and can be either specular (like a mirror) or diffuse (like a matte surface).

2. Refraction: Both sound waves and light waves can be refracted or bent when they pass through a medium with a different density. When a sound wave is refracted, it changes direction and speed, while when a light wave is refracted, it can change direction, speed, and wavelength.

3. Interference: Both sound waves and light waves can exhibit interference when two or more waves combine to form a resultant wave. In sound waves, interference can be constructive, where the amplitudes of the waves add together, or destructive, where the amplitudes cancel each other out. In light waves, interference can be either constructive, where the waves add together to create bright fringes, or destructive, where the waves cancel each other out to create dark fringes.

Therefore, sound waves and light waves are both types of waves that exhibit similar behaviors such as reflection, refraction, and interference. However, they differ in their physical properties such as the medium they travel through, their speed, and their frequency.

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Final answer:

Using the conservation of momentum, the final speed of the boy after throwing the pumpkin is 0.7467 m/s to the left, and the final speed of the girl after catching the pumpkin is 0.6857 m/s to the right.

Explanation:

The problem you're trying to solve involves the conservation of momentum, because momentum is conserved when objects interact in a closed system without external forces, such as the scene described with skaters on ice. To find the final speeds of the boy and the girl, we'll use the principle of conservation of linear momentum. Since initially they are both at rest and the boy throws the pumpkin, the final momentum of the system must be zero.

Using the equation for conservation of momentum: momentum before the throw = momentum after the throw. Initially, both the boy and the pumpkin are stationary, so their initial combined momentum is 0. After the boy throws the pumpkin, he will move in the opposite direction to conserve momentum.

Momentum of the boy after the throw: m_boy × v_boy = 0 - (mass of pumpkin × velocity of pumpkin)
Momentum of the girl after catching the pumpkin: m_girl + mass of pumpkin × v_girl = mass of pumpkin × velocity of pumpkin

m_boy = 45kg (mass of the boy)
m_pumpkin = 12kg (mass of the pumpkin)
v_pumpkin_initial = 2.8 m/s (speed of the pumpkin)

Let's calculate the speed of the boy after he throws the pumpkin:

45kg × v_boy = 0 - (12kg × 2.8 m/s)
v_boy = (-33.6 kg×m/s) / 45kg
v_boy = -0.7467 m/s

The negative sign indicates that the boy is moving in the opposite direction to the pumpkin's initial movement. Now, let's find the speed of the girl after catching the pumpkin:

(37kg + 12kg) × v_girl = 12kg × 2.8 m/s
49kg × v_girl = 33.6 kg×m/s
v_girl = 0.6857 m/s

The boy's final speed is 0.7467 m/s to the left, and the girl's final speed is 0.6857 m/s to the right.

Answer:

d.

No, if velocity becomes too great, the planet can escape the Sun's gravitational pull.

Explanation:

It is correct on Edge 22

Answer:

I did my best to research to help you

Explanation:

The answer would be in space because there is no matter and if there isn't matter the sound of a ringing cell phone could not be transmitted.

We have that we use dissolving, filtration and distillation to separate sand from salt

Sand can be separated adding water to the mixture upon dissolving we filter to get the salt solution out of the sand

Then we distill by boil salt solutions at vaporization temperature of water to get salt back the water and salt solution to get salt back

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Answer:

b. when the sun, Earth, and the moon are nearly in a line

Explanation:

Due to gravitational pull of sun and moon, the level of water in seas and oceans rises above its normal level. This is known as tides. Highest tides occur when the sun, the moon and the Earth align in a straight line i.e. during New moon and Full moon. This is because in this alignment, there is maximum effect of gravity. Tide occurrence during this phase are also referred as spring tides.

the answer is c) spread out