2) A centrifuge is used to spin medical samples and separate substances by their masses. If the matter that ends up at the bottom of the test tubes is spinning at a tangential velocity of 50 m/s, at a distance of .04 m from the axis of rotation, what is the radial acceleration? a) 62,500 m/s2 b) 75,000 m/s? c) 40,500 m/s? d) 55,000 m/s2 T

Which feature indicates that mars resides in the inner region of the solar system

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 is a carrier wave and how does it affect what you hear on the radio