Explanation:
It is given that,
Length of the rod, l = 14 cm = 0.14 m
Charge on the rod, 
We need to find the magnitude and direction of the net electric field produced by the charged rod at a point 36.0 cm to the right of its center along the axis of the rod, z = 36 cm = 0.36 m
Electric field at the axis of the rod is given by :

Where
is the linear charge density of the rod,


E = -7493170.57 N/C
or

Negative sign shows that the electric field is acting in inwards direction. Hence, this is the required solution.
Answer:
The amplitude of the spring is 32.6 cm.
Explanation:
It is given that,
Mass of the block, m = 2 kg
Force constant of the spring, k = 300 N/m
At t = 0, the velocity of the block, v = -4 m/s
Displacement of the block, x = 0.2 mm = 0.0002 m
We need to find the amplitude of the spring. We know that the velocity in terms of amplitude and the angular velocity is given by :



So, 
A = 0.326 m
or
A = 32.6 cm
So, the amplitude of the spring is 32.6 cm. Hence, this is the required solution.
Answer:
F = m × a = 50 kg × 0.8 m/s2 = 40 kg • m/s2, or 40 N
Explanation:
Thermostat is used to control the temperature in a room
The prisoners were forced to hide under their beds or take cover as the Russians would have to fight their way into the camps. Hope this helps :)