A book with a mass of 3.3 kg sits on a bookshelf. If it has a gravitational
potential energy of 57 J, how high is the shelf? The acceleration of gravity is
9.8 m/s2

Metal A would be the best conductor of heat as the most number of balls fell from the vibration of particles.

Often referred to as a "heat conductor," a conductor of heat is a substance or material that makes it simple for heat to pass through it. Heat energy is transported from the higher-temperature region to the lower-temperature region when there is a temperature differential between two points in a conductor.

The passage of thermal energy from one molecule to another within the conductor is what causes this heat transfer process to happen. The best conductor is Metal A. The most heat, or the energy of the vibration of particles, will be conducted by the best conductor. As the greatest number of balls dropped as a result of particle vibration, metal A transmitted heat the best.

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Answer:

C

Explanation:

The pattern is adding .5 to the cm every .1 in weight you just continue the table

Answer:

C

Explanation:

Which types of EM waves can reach Earth's surface?

Most electromagnetic radiation from space is unable to reach the surface of the Earth. Radio frequencies, visible light and some ultraviolet light makes it to sea level. Astronomers can observe some infrared wavelengths by putting telescopes on mountain tops.

Answer:

Answer:

C. Beats

Explanation:

When waves are interfering with each other, the sound is louder in some places and softer in others. As a result, we hear pulses or beats in the sound.

Answer:

beats

Explanation:

got it right

Answer:

39,200J

Explanation:

just took the test

The meteor's potential energy if it has a mass of 10kg at an altitude of 400 m will be 39200 J

Potential Energy that depend upon the relative position of various parts of system . It is an energy possessed by an object by virtue of its position or configuration.

mass(m)  = 10kg

g (acceleration due to gravity) = 9.8m/s^2

altitude(height (h)) = 400m

Meteor's Potential energy = m * g * h

                                           = 10 * 9.8 * 400 = 39200 J

correct option will be a) 39200 J

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The magnet produces a magnetic field. Item A makes the magnetic field in the electromagnet.

Explanation:

Item A is called a magnet. It has a North pole and a South pole. The electrons move from the North to the south poles, creating a magnetic force.

This Magnetic field creates a magnetic field around a magnet.

Answer: D

Explanation: it is made of metal which attracts the magnetic force field

Answer:

Objects with mass attract each other because of gravity. Gravity is caused by the attraction of objects with mass. Mass does not attract mass, but rather spacetime is curved. You could even argue there is no mass, its all just energy.

Explanation:

Answer:

a.1- independent variable is the sharpener, dependent variable is the pencil brand

a.2- independent variable is the basket ball and dependent variable is amount of air

a.3- independent variable is the person running and dependent is the Gatorade flavor

Explanation:

An independent variable is exactly what it sounds like. It is a variable that stands alone and isn't changed by the other variables you are trying to measure. A dependent variable is exactly what it sounds like. It is something that depends on other factors

Answer:

The announcement he had made promised to overturn our understanding of the Universe. If the data gathered by 160 scientists working on the project were correct, the unthinkable had been observed. Particles – in this case, neutrinos – had travelled faster than light.

Explanation:  Plz Mark brainleist

Answer:

Explanation:

Radiation is the transfer of heat energy through space by electromagnetic radiation.

Answer:

B

Explanation:

This helps improve the quality.

The action that could a scientist take in order to improve the quality of the results is as follows:

Thus, the correct option for this question is B.

The Experimental design may be characterized as a methodology of research in the field of sciences in which a controlled experimental factor is exposed to special treatment with the intention of comparing with a factor kept constant.

The identification of partiality during the designing of an experiment is foremost important. This is because it significantly leads to an error or it affects the overall quality of the results on the basis of valid evidence.

Therefore, identifying any biases about the answer to the scientific question is an action that could a scientist take to improve the quality of the results. Thus, the correct option for this question is B.

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Visible silicate minerals split into dark and light bands or lineations in a metamorphic foliation known as gneissic banding. Typically coarse and frequently folded, these grains. Gneiss is the name for a rock with this texture.

The faster an object is going, the more resistance there will be. An example of this would be if you're running the faster you run, the more air is going against you.

I hope this helps!

Answer:

PRESSURE is a force exerted by the substance per unit area on another substance. The pressure of a gas is the force that the gas exerts on the walls of its container. ... Atmospheric pressure varies with height just as water pressure varies with depth.

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plz can i get brainliest

One component of my school's recycling system that could be automated is the sorting of recyclables. Currently, the school relies on students and staff to sort recyclables into the appropriate bins, which can be time-consuming and may result in contamination if materials are not sorted properly.

Automating the sorting process with a machine or conveyor belt system could improve the efficiency and accuracy of the recycling system. It could also potentially reduce labor costs associated with manual sorting.

The economic impact of automating the sorting process would depend on the initial cost of the equipment and any associated installation or maintenance costs. However, over time, the improved efficiency and accuracy of the system could result in cost savings for the school. Additionally, the increased efficiency of the system could potentially lead to increased recycling rates, which could result in cost savings for waste disposal and potentially generate revenue through the sale of recycled materials.

Answer:

Our school has color coded virtual trash cans. For example, a trash can for only paper will only accept paper items, if the item put inside is not paper, it will litter it out and all students have cleaning duties throughout the week so even if you or someone litters you’ll probably have to clean it up at some point anyways. I honestly think it’s very cool. (i wish this was true smh).

The temperature of water changes as It decreases first and then remains constant . when it is placed in a freezer and then begins to freeze, therefore the correct answer is option A .

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy .

When water changes to ice, firstly the temperature of the water decreases due to the specific heat, and during the phase change process, the temperature of the water remains constant .

Water temperature fluctuates when it initially drops and then stays the same . The right response consequently options A when something is placed in a freezer and starts to freeze .

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Answer:

e

Explanation:

Answer: three small bones in the middle ear

Explanation: Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.

When sound waves cause the eardrum to vibrate, these vibrations are immediately passed on to the three small bones in the middle ear. So, the correct option is C.

A sound wave is defined as a pattern of disturbance that is caused by the movement of energy that travels through a medium such as air, water or any other liquid or solid substance as it propagates away from the source of the sound which is the object made by vibration and pressure generate waves, for example, a ringing cellphone.

These waves enter the outer ear and pass through a narrow passage called the ear canal leading to the eardrum which vibrates with the incoming sound waves and sends these vibrations to three small bones in the middle ear where these bones are called malleus, incus. and steppes.

Thus, the correct option is C.

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40g remains after an hour.

short wavelength

Answer:

The estimated braking force needed to stop the lorry is zero, based on the given information and calculations. However, it's important to note that this result is likely not accurate, as some force is required to stop a moving object. It's possible that additional information or calculations are needed to obtain a more realistic estimate of the braking force.

Explanation:

To estimate the braking force needed to stop the lorry, we can use Newton's second law of motion, which states that force (F) is equal to mass (m) multiplied by acceleration (a).

In this case, the lorry decelerates uniformly, so the acceleration is constant. The initial velocity is assumed to be zero since the lorry comes to a stop. The final velocity is also zero. Therefore, we can use the equation:

Final velocity squared (vf^2) = Initial velocity squared (vi^2) + 2 * acceleration (a) * distance (d)

Since vi = 0 and vf = 0, the equation simplifies to:

0 = 0 + 2 * a * d

Solving for acceleration (a), we have:

2 * a * d = 0

a = 0

Since the acceleration is zero, it means that the braking force needed to stop the lorry is also zero. This is likely not an accurate result as some force is required to stop the lorry. It's possible that additional information or calculations are needed to accurately estimate the braking force.

The braking force required to stop a 6371 kg lorry after spotting a hazard and applying the brakes is what the question is asking for. The lorry decelerates uniformly and comes to a stop 60 meters after the brakes are applied.

The following steps will guide you on how to calculate the braking force:

Step 1: Determine the mass of the lorry which is 6371 kg. This will be denoted as m.

Step 2: Determine the distance travelled by the lorry, which is 60 m.

Step 3: Determine the time taken by the lorry to stop. This can be done by using the formula for uniform deceleration, which is a = (v-u)/t where v is the final velocity, u is the initial velocity and a is the uniform deceleration. Since the lorry comes to a stop, its final velocity is zero and its initial velocity is unknown.

However, we can assume that the lorry was initially travelling at a constant speed before spotting the hazard. Therefore, we can assume that the initial velocity was equal to the average velocity of the lorry before the brakes were applied.

This can be calculated using the formula v = d/t where d is the distance travelled and t is the time taken. The average velocity can therefore be calculated as follows: v = d/t = 60 m/t

Step 4: Rearrange the formula for uniform deceleration, a = (v-u)/t, to find u which is the initial velocity. Since the lorry comes to a stop, we know that v = 0.

Therefore: u = v - at where a is the uniform deceleration and t is the time taken to stop which is also equal to the time taken for the lorry to travel the distance of 60 meters. Substituting for v, we get: u = - at

Step 5: Calculate the acceleration of the lorry using the formula a = (v-u)/t. Since the final velocity is zero, we get: a = -u/t = -(-at)/t = a The acceleration is negative since the lorry is decelerating.

Step 6: Calculate the braking force using the formula F = ma where F is the braking force and m is the mass of the lorry. Therefore: F = ma = (-ma) since a is negative = (-6371 kg) (a) Therefore, the braking force required to stop the lorry is -6371a N where a is the uniform deceleration calculated in Step 5.

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Answer:Gravity is the force among the options listed that has not directly changed Earth's surface.

Explanation:

Gravity is a fundamental force that acts on all objects with mass, including the Earth itself, but it does not cause changes or modifications to the Earth's surface features. Instead, gravity influences the movement of materials and the shape of the Earth's surface by exerting a pulling force on objects. On the other hand, folding, erosion, and weathering are all processes that directly contribute to shaping

Answer:

HEY THERE!!

Explanation:

the answer to your question is option:

D by cooling evaporation

HOPE THIS HELPED HAVE A GREAT DAY AND GOOD LUCK ON YOUR EXAMS WISHING YOU THE BEST!! <33

Answer:

It is impossible to detect underground water from the surface. Dowsing practitioners refuse to explain their secrets.

Explanation:

Answer:

its a compass rose or a temperature that tells how is it hot or cold or it is to u where to go when needed like a map.And the angles is 6

Explanation: