Atraveling electromagnetic wave in a vacuum has an electric field amplitude of 81.1 v/m. calculate the intensity s of this wave. then, determine the amount of energy u that flows through the area of 0.0253 m^2 over an interval of 19.9 s, assuming that the area is perpendicular to the direction of wave propagation.

U = 4.39 J

Explanation:

Electric field energy stored in the medium or vacuum is given as

here we know that

E = 81.1 V/m

V = volume

now from above formula we have

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation: