Which statement correctly describes the relationship between power, voltage, and current?

if voltage is increased, and no other changes are made, power will decrease.

if voltage is increased, and no other changes are made, power will increase.

if current is decreased, and no other changes are made, power will increase.

in order to decrease power, voltage must be decreased.

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

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.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?