Author Question: Assume that a certain city consumes electrical energy at an average rate of 2.0 109 W. What would ... (Read 79 times)

misspop · **on:** Jul 29, 2018

Assume that a certain city consumes electrical energy at an average rate of 2.0 109 W. What would be the mass change in producing enough energy to keep this city running for 21 weeks? (c = 3.00 108 m/s)

A) 0.28 kg
B) 0.32 kg
C) 0.39 kg
D) 0.48 kg

Question 2

If a beam of electromagnetic radiation has an intensity of 120 W/m2, what is the maximum value of the electric field? (c = 3.0 108 m/s, 0 = 4 10-7 T m/A, 0 = 8.85 10-12 C2/N m2)

A) 1.5 kV/m
B) 1.0 T
C) 1.0 V/m
D) 0.30 kV/m
E) 0.0032 V/m