Answer.A you should wait 60 minutes so a hour
He can increase the total energy of the system by spinning the top faster.
<h3>What is energy?</h3>
The term energy refers to the ability to do work. The total energy of the system refers to the gravitational potential energy and the rotational energy of the top.
Hence, he can increase the total energy of the system by spinning the top faster.
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Answer:

Explanation:
r = Rate of flow of charge = 20000 C/s
t = Time taken = 100 μS
Charge is given by

The charge that flows between the ground and the cloud in this time is 2 C
Number of electrons is given by

The number of electrons is 
We can solve the problem by using Newton's second law of motion:

(1)
where
the term on the left is the resultant of the forces acting on an object
m is the mass of the object
a is the acceleration of the object
The mass of the ball in this problem is m=1 kg. Two forces are applied, in opposite directions, of 20 N and 12 N, therefore the resultant of the forces is

Therefore, we can rearrange eq.(1) and use these data to find the acceleration of the ball:
The best explanation is the <em>difference</em> between the inside <em>temperature</em> and the outside temperature.
If the player doesn't change his emboucher (muscles and position of his lips), then the pitch produced by the instrument depends only on the physical dimensions of its plumbing, and the speed of sound in the tube.
BOTH of those things change slightly when the temperature changes.