Jeff is investigating factors that affect the growth rate of potted bean plants. which of the following experimental variables would not be relevant to his investigation?

a. the type of soil used
b. the amount of water given
c. the color of the pot
d. the amount of light exposure

Porque crees que el agua no podia subir mas de 10 m de altura con ese tipo de bomba

What is the mass of the same rock on the earth

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.