Answer:
Speed, 
Explanation:
Given that,
Distance covered by the electron, d = 32 cm = 0.32 m
Time, t = 2 ns
We need to find the speed of an electron. Speed is equal to distance covered divided by time. So,

So, the speed of the electron is
.
D) There will be less available for other living things.
Becuase for sound to happen you need air, And there is no oxygen is space.
In physics mass-energy equivalence is the principal that anything having mass has an equivalent amount of energy and vise versa.