Newtons 3.law: Action = Reaction
If a body exerts a force on a rope of 400 N the rope exerts a force on the body of 400N also. So the tension in the rope is 400N. See pictures below.
Try to repost so somebody answer
Explanation:
The capacitance in two parallel-plate capacitors is:

For air, we have 
For plastic, we have 
Hence:

a) Recall that the potential difference between the plates is the same (
). The electric field is given by:

The potential difference is defined as:

Replacing:

b) The energy is defined as:

So:

Answer:
Current in circuit = 2 amp
Explanation:
Given:
Voltage of battery = 10 V
First Resistance R1 = 1 ohm
Second Resistance R2 = 4 ohm
Resistor connected in series
Find:
Current in circuit
Computation;
Resistor connected in series
So,
Total resistance R = First Resistance R1 + Second Resistance R2
Total resistance R = 1 ohm + 4 ohm
Total resistance R = 5 ohm
Current in circuit = V / R
Current in circuit = 10 / 5
Current in circuit = 2 amp
Explanation:
Light travels fastest through air