Keisha drew a diagram to compare two of the fundamental forces. weak. | between | strong. |
nuclear force | | nuclear force |
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Which labels belong in the areas marked X, Y, and Z? Weak Nuclear Force Strong Nuclear Force O X: Always attractive Y: Very small range Z: Attractive and repulsive O X: Attractive and repulsive Y: Very small range Z: Always attractive O X: Very small range Y: Attractive or repulsive Z: Infinite range O X: Infinite range Y: Attractive or repulsive Z: Very small range х N

What happens to light waves from a star as the star moves away from 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.

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?