Answer:
2240.92365 m/s
Explanation:
= Mass of electron = 
= Speed of electron = 
= Neutrino has a momentum = 
M = total mass = 
In the x axis as the momentum is conserved

In the y axis

The resultant velocity is

The recoil speed of the nucleus is 2240.92365 m/s
B. We can see only one side of the Moon from Earth.
( we only see one side of the moon because the moon rotates around the Earth)
Both particles and big objects will be influenced by each other less if they are moved further apart.
It’s frequency is high and microwaves can pass through the atmosphere of the Earth.