Answer:
The number of molecules displaced in a vibration makes the amplitude of a sound.
Hydrogen fuel cells is the answer
Answer:
3.6 m
Explanation:


Also


Therefore, the minimum distance L you can place a screen from the double slit that will give you an interference pattern on the screen that you can accurately measure using an ordinary 30 cm (12 in) ruler. = 3.6 m
Metal
Explanation:
semiconductors are materials which have a conductivity between conductors (generally metals)