It's the movement of a object along the circumference of a circle or the rotation along a circular path.
Explanation:
Given that,
Magnitude of electric field in +x direction, E = 4.9 V/m
Part A :
The relation between electric and magnetic field is given by :
![B=\dfrac{E}{c}](https://tex.z-dn.net/?f=B%3D%5Cdfrac%7BE%7D%7Bc%7D)
c is the speed of light
![B=\dfrac{4.9\ V/m}{3\times 10^8\ m/s}](https://tex.z-dn.net/?f=B%3D%5Cdfrac%7B4.9%5C%20V%2Fm%7D%7B3%5Ctimes%2010%5E8%5C%20m%2Fs%7D)
![B=1.63\times 10^{-8}\ T](https://tex.z-dn.net/?f=B%3D1.63%5Ctimes%2010%5E%7B-8%7D%5C%20T)
So, the magnetic field of the wave at this same point in space and instant in time is
.\
Part B :
The direction of electric and magnetic field is same i.e. +x direction.
Hence, this is the required solution.
Newton's Third Law of Motion states, for every action there is an equal and opposite reaction. So if this person kicks the door with a force of 32.0N, then the door kicks back with a force of 32.0N, but instead it is in the opposite direction, so it would be -32.0N.
D. Amplitude has no effect on velocity.
This question might have been to confuse you with the doppler effect which states that wavelengths become longer if the object causing the waves is moving away from the observer.