Fred and Stella dock a canoe. Fred has a mass of 75 kg and steps forward onto the dock at 3.0 m/s. With what speed and direction do the canoe and Stella move if their combined mass is 105 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.

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius