The range of the tides is affected by the relative positions of the sun and the moon. during the new moon and full moon, the highest high tides and the lowest low tides occur. during the first and third quarters of the lunar month, the lowest high tides and the highest low tides occur. throughout the month, the tidal range gradually increases and decreases between the minimum and maximum values of the range.
- sketch a graph of a tidal range as a function of time, showing what you think the shape of a tidal cycle might look like for one month. on your graph, indicate where you think

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.

More solar radiation is absorbed by earth’s surface than by

In a good thermo flask the main cause of heat loss is