That's false. No medium = no sound.
The answer is D, because the collision's between molecules are elastic, not inelastic.
Answer:
A) 1.5 v
B) Top plate is at higher voltage than the bottom plate
Explanation:
Battery value set between 0.0 V and 1.5 V
a) The potential difference between the plates
Δ V = V1( potential at top plate) - V2( potential at lower plate )
potential at top plate = 1.5 V
potential at lower plate = 0.0 V
hence potential difference = 1.5 V
b ) The top plate is always connected to the positive terminal of the DC source ( which is at a higher potential )while the bottom plate is connected to the negative terminal of the DC source ( which is at a lower potential )
hence the Top plate is at higher voltage than the bottom plate
2 minutes is 120 seconds, so if you were finding vibrations per minute, it would be 60 times a minute.
The rate of change of object's velocity per unit of time is known as acceleration.
Hope this helps you.