Answer: When there is an increased number of sun spots, it means the surface temperature is decreased which will decrease the temperature of the Earth's surface as well
Explanation:
Microsecond is greater
A microsecond is 0.000 001 second and one thousand times longer than 1 nanosecond, which is 0.000 000 001 second.
To solve the exercise it is necessary to use the reciprocal Lorenz factor of the special theory of relativity with the pulse rate.

Where,
Pulse rate measured by earth observed
Reciprocal Lorenz Factor

Here v is the velocity and c the light speed.
PART A) For the given values we can replace it at the previous equation,



PART B ) If the speed of vehicle is 0.94c:



We have centripetal acceleration = 
So, v = 
Now by equation of motion we have S= ut +0.5a
S =displacement, u = initial velocity, a= acceleration and t = time
Here S = 2r and a = g , u = 0


Distance traveled in horizontal direction = 