Aplane electromagnetic wave varies sinusoidally at 90.0 mhz as it travels along +x direction. the peak value of the electric field is 1.00 mv/m, and it is directed along the +-y direction. (a) find the wavelength, the period, and the maximum value of the magnetic field.
(b) find the average power per unit area that this wave carries through space.
(c)find the average energy density in the radiation(in joules per cubic meter.)
(d) what radiation pressure would this eave exert upon a perfectly reflecting surface at normal incidence?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?