Answer: Because The potential energy you build going up the hill can be released as kinetic energy — the energy of motion that takes you down the hill. Once you start cruising down that first hill, gravity takes over and all the built-up potential energy changes to kinetic energy. Gravity applies a constant downward force on the cars.Potential energy is the energy an object has as a result of its position. Potential energy is stored energy that has not yet been released. Gravitational potential energy is potential energy that results from an object's position in a gravitational field, and is equal to the object's weight multiplied by its height.

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Explanation:

8 0

3 years ago

A hydrocarbon has molecular formula C3H8. Identify the class of hydrocarbons it belongs to.

Olenka [21]

It belongs to alkane family

7 0

3 years ago

What is the function and an example of a muscle(tissue)?

ella [17]

The function of muscular system is to move our body, so if I had no muscle in my fingers I wouldn't have been able to type this answer.

For muscle tissue there are three types of tissues: skeletal, cardiac, and smooth muscle. They provide posture and body support, locomotion, and heat production.

Hope you understand what I said

3 0

4 years ago

Is a conduit for the sarcoplasmic reticulum to remove ca2+ from the cytosol?

Oxana [17]

No.
The SR is ordinarily involved in intracellular (cytosolic) calcium *release*, not removal.

SERCA pumps help to control cytosolic calcium levels and calcium uptake, or lack thereof when inhibited e.g. by PLB (phospholamban). Proteins calsequestrin, Triadin, and Junctin work at the ryanodine receptors to help to modulate and control cytosolic calcium levels.

Hope this helps!

4 0

4 years ago