Answer:
I. don't. get. this. question
C. Demand increases
Pace increases
Answer:


Explanation:
k = Coulomb constant = 
Q = Charge
r = Distance = 8 cm
R = Radius = 4 cm
Electric field is given by

Volume charge density is given by

The volume charge density for the sphere is 

The magnitude of the electric field is 
Answer:
of the velocity of a full size plane in the air
the answer is b. it's commercially reprocessed