The concept used to solve this problem is the conservation of momentum and the conservation of energy.
For conservation of the moment we have the definition:
Where,
m = Mass
= Initial velocity for object 1
= Final velocity
Replacing the values we have to,
By conservation of energy we know that the potential energy is equal to the kinetic energy then
Therefore after the collision the height when the combined chinks will go is 1.837m
Answer:
The intensity of the EM wave is 5.729 W/m²
The rms value of the electric field is 46.452 V/m
Explanation:
Given;
power of the electromagnetic wave, P = 1800 W
The intensity of light is given by;
I = P / A
Where;
A is the surface area of the sphere = 4πr²
A is the surface area of the sphere = 4π(5)²
A is the surface area of the sphere = 314.2 m²
The intensity is calculated as;
I = P / A
I = (1800) / (314.2)
I = 5.729 W/m²
The rms value of the electric field is given by;