A mechanical wave must have a medium.
Hope this helps,
♥<em>A.W.E.<u>S.W.A.N.</u></em>♥
Answer:
No, it's not there.
Explanation:
For a machine to be 100% efficient, it has to be with an output which is equal to its input. But machines have an out put less than an input, hence efficiency below 100%.
Velocity is speed and the direction of the speed. Acceleration is the rate at which Velocity is changing, and the direction in which it's changing.
D garden salad : )
A heterogenous mixture can be easily taken apart visually/physically