In the standing waves experiment, the string has a mass of 47.3 g and a length of 0.93 m. the string is connected to a mechanical wave generator that produce standing waves with frequency of f. the other end of the string is connected to a mass holder (mholder = 50.0 g) that carries a weight of 5.00x10^2 g. calculate the tension in the string. (g = 9.80 m/s^2)

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

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 fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.