Explanation:
Energy can be converted from one form to another. Examples: Gasoline (chemical) is put into our cars, and with the help of electrical energy from a battery, provides mechanical (kinetic) energy. ... Similarly, purchased electricity goes into an electric bulb and is converted to visible light and heat energy.
All living creatures contain carbon
Answer:

Explanation:
We could use conversation of energy. Total distance the stone will cover will be

the Final velocity will be

Answer:
Yes the valency of oxygen is 2