Aircraft sometimes acquire small static charges. suppose a supersonic jet has a charge of +0.05 c and flies due west at a speed of 660 m/s over a location where the 8.00 x 10-5 t magnetic field points straight up (vertically out of the earth or out of the paper). what are the direction and the magnitude of the magnetic force on the plane?
a. 2.64 x 10-4 n to the west (direction of v)
b. 2.64 x 10-3 n straight up (direction of b)
c. 2.64 x 10-3 n to the north
d. 2.64 x 10-4 n to the south
discuss whether the value obtained implies this is a significant or negligible effect.

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

What are similarities and differences of reflection, refraction, diffraction and absorption?