It means you can do 550 Newton Meters of work every second. Power is the rate of doing work, I hope this helps
Answer:
B
Explanation:
nothing to do with black holes creating star or related
Answer:
-611.32 N/C
0.43723 m
Explanation:
k = Coulomb constant = 
q = Charge = -4.25 nC
r = Distance from particle = 0.25 m
Electric field is given by

The magnitude is 611.32 N/C
The electric field will point straight down as the sign is negative towards the particle.

The distance from the electric field is 1.71436 m
Hmm, I will come back to this one just to help. :)