Which statement is true?

the law of equal areas suggests that the imaginary line connecting the sun to a planet sweeps out equal areas in equal amounts of time.

the law of equal areas suggests that the imaginary line connecting the sun to a planet sweeps out equal areas, but in a shorter time period the closer the planet is to the sun.

the law of equal areas suggests that the imaginary line connecting the sun to a planet sweeps out different amounts of space in equal amounts of time.

the law of equal areas suggests that the imaginary line connecting the sun to a planet sweeps out equal areas, but in a faster time period the closer the planet is to the sun.

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.

An electric clothes dryer has a resistance of 8 ohms. it draws 30 a of current. what is the voltage, in volts, of the wall outlet that it is plugged into?

The unit of resistivity is the: ohm ohm-cm volt coulomb