Answer:
0.9 N, east
Explanation:
charge, q = 1 mC = 0.001 C
Electric filed, E = 900 N/C due east
Force, F = q E
F = 0.001 x 900
F = 0.9 N
The direction of force is same as the direction of electric field as the charge is positive in nature. So, the direction of force is also east.
Answer: 324.135 kJ
Explanation:
Given
Mass of dropping is 
The initial height of dropping is 
The final height of dropping 
Gravitational potential energy is the function of height i.e.

Change in Gravitational Energy is

Answer:
I mean this is what I think
Explanation:
you would need to place a rock on top of each other until you reach the ceiling
It seems logical to me
The period of the wave is 25 s
<u>Explanation:</u>
To find the period of the wave, we have the formula
T= seconds/ no of cycle
T= 125/5
T= 25 s
The period of the wave is 25 s