Which of the following has mechanical energy?
Chose all the answers that apply

A. bouncing ball

B. water in a reservoir

C. book on a table

D. person running

E. falling tree

A. bouncing ball

B. water in a reservoir

C. book on a table

D. person running

E. falling tree

All of the above

Explanation:

Energy is commonly defined as the ability to do work. Mechanical energy is a type of energy possessed by an object when I motion (moving) or in a position (resting).

Mechanical energy has two types viz: kinetic energy and potential energy. Kinetic energy is the energy possessed by a moving object while potential energy is that possessed at a fixed position.

Therefore, in this question, all the examples portrays a moving or stationary object, which makes all an example of mechanical energy. Bouncing ball (moving), water in a reservoir (stationary), book on a table (stationary), person running (moving) etc.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.