A traveling electromagnetic wave in a vacuum has an electric field amplitude of 57.9 V/m. Calculate the intensity S of this wave. Then, determine the amount of energy U that flows through area of 0.0223 m 2 over an interval of 18.5 s, assuming that the area is perpendicular to the direction of wave propagation.

In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.