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An electromagnetic wave has a wavelength of 5.35 cm and an electric field amplitude of 3.48 V/m. It is moving in the +y direction in vacuum.
(a) What is the frequency of the wave?
(b) What is its magnetic field amplitude?
(c) If the electric field is in the -x direction, what is the direction of the magnetic field?
(d) Write down the equations for the electric and magnetic fields of the wave
How many nitrogen molecules must strike a 1 cm2 surface each second to exert a pressure of 1 atm (Assume that the molecules are all moving at the same speed, at a temperature of 300K, and 45 degree angle to the wall).
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Four closed surfaces, S1 through S4, together with the charges -2Q, Q, and -Q are sketched in the figure below. Find the electric flux through each surface.
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