The water at the top of a waterfall has _____ energy.potential
kinetic
heat
metabolic

Answers

Answer 1

Answer: I believe the answer isPOTENTIAL ENERGY. The water at the top of the waterfall has Potential Energy.Potential Energy is defined as the energy that is stored when an object is atrest. At the top of the waterfall, water will have maximum potential energy. Whenthe water falls down, it is will already have kinetic energy which is energythat is produced through continuous motion. When it is finally in the bottom,water will have maximum kinetic energy.

Answer 2

Answer:

Answer:

The water at the top of a waterfall has __potential___ energy.

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Can someone help please

a graph depicts force versus position. what represents the work done by the force over the given displacement?

Answers

The area under the graph. W = f d cos(theta), so you want the number that is force times displacement, which corresponds to the area under the graph.

In your own words, describe why melting ice with salt freezes cream. Compare your descriptions to your classmates and describe how you could change the setup to freeze the cream faster, to produce colder temperatures or to cool other substances.

Answers

By adding salt to the ice-creams, it lowers its melting point and allows the ice cream to freeze cohesively. When salt is added to ice, the equilibrium is reached and kept at lower temperature.

How salt lowers the freezing point of ice?

When water reaches 32°F ( 0°C ), It turns into ice. At this temperature, The water molecules and ice molecules are interacting. If the temperature increases, more water become ice.

When the ionic compound salt is added, it lowers the freezing point of water. This concept is called "Freezing point depression". Freezing point depression is a drop in the minimum temperature at which substance freezes, caused when a smaller amount of another, non-volatile substance.

When salt added to the ice, the freezing point reduces from zero to negative value of degree Celsius -9°C( 15°F ), The temperature of salt is too cold for the salt to dissolve into the ice.

Learn more about Freezing point :

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Answer:

Water normally freezes at 0°C (32°F). Salt lowers the freezing temperature. (That is, it can remain a liquid at much lower temperatures.)

When sprinkled on ice, the salt lowers the freezing temperature of the water which effectively melts the ice when the salt dissolves into it. There is a limit to how low it can reduce the temperature, though. If the temperature drops below -9°C (15°F), it's too cold for the salt to dissolve into the ice.

When making ice cream, the salt lowers the temperature of the ice and water sufficiently enough to freeze the cream.

The amount of work done by two boys who apply 200 n of force in an unsuccessful attempt to move a stalled car is?

Answers

Work = (force) x (distance)

It doesn't matter if the whole football team is pushing on it.
Until the car moves, no work has been done.

What type of image is formed by a mirror if m = -6.1? A. An image that is larger than the object and is behind the mirror
B. An image that is larger than the object and is in front of the mirror
C. An image that is smaller than the object and is in front of the mirror D. An image that is smaller than the object and is behind the mirror

Answers

B. An image that is larger than the object and is in front of the mirror

a ball is thrown upward at 25 m/s from the ground. what is the average velocity and average speed of the ball after 5 seconds?

Answers

When the ball reaches the highest point, its velocity will be zero. So final velocity is v=0m/s
Here, the time to reach highest point is equal to time to hit ground from highest point.
Consider upward motion, the acceleration of the ball is a=−g=−9.8m/s
2
(minus for motion opposite to gravity)
If t be the required time.
Using v=u+at,
0=25+(−9.8)t
⟹ t=2.5s
Thus the ball hits the ground after 2.5 seconds after reaching its highest point.

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