The formula for average speed is
So we can just substitute our data.
- its the result
Explanation:
first is to find periodic time
12.2÷20= 0.61 s
f= 1/T
=1/0.62
=1.639Hz
I think the answer will be 7% or 7J. not sure :-)
Answer:
Explanation:
Kinetic energy involves motion so something that is not moving has zero kinetic energy.
Potential energy does not involve motion and is based on position in a field like gravity and magnetic.
The megaphone is cupping the area around her mouth and it is like with your hands, if you cover around them the noise will be louder. It is because it is hollow and there isn't anything to block the noise through the megaphone.