A mechanical wave can be defined by

d. All of the above

Explanation:

Here is the complete question

A mechanical wave can be defined by which of the following?

a. Carries energy from one place to another

b. Moves through solids, liquids, and gasses

c. Is created when a source of energy creates a vibration

d. All of the above

Solution

A mechanical wave is an oscillation of matter which carries energy from one place to another. This oscillation of matter shows that a mechanical wave requires a medium to pass through, be it solid, liquid or gas.

A mechanical wave can usually be created by the the vibration of a medium due to a source of energy.

Examples of mechanical waves are sound waves and water waves

Since all these characterize a mechanical wave, the option d is the correct answer

answer is c

explanation:

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.