Answer:

Explanation:
Let the charge on the ball bearing is q.
charge on glass bead, Q = 20 nC = 20 x 10^-9 C
Force between them, F = 0.018 N
Distance between them, d = 1 cm = 0.01 m
By use of Coulomb's law in electrostatics

By substituting the values


Thus, the charge on the ball bearing is 
Heat is something that really get hot. And transfers is when you send something to another person or another place.
4
Just divide 12 by 3, so if it takes 3 seconds, then every second, it goes up 4.
Answer:
0.02 m
Explanation:
R₁ = initial distance jumped by jumper = 7.4 m
R₂ = final distance jumped by jumper = ?
θ₁ = initial angle of jump = 45°
θ₂ = final angle of jump = 42.9°
= speed at which jumper jumps at all time
initial distance jumped is given as

final distance jumped is given as

Dividing final distance by initial distance



distance lost is given as
d = 
d = 7.4 - 7.38
d = 0.02 m
Power= energy/time= 360/(2*60)=3 W thats 2nd option