A bowling ball with a mass of 6 kg is given two hundred joules of kinetic energy when roll down the lane. It looses 5 joules of kinetic energy due to friction on the lane. It transfers 150 joules of kinetic energy to the pins. Collisions with the pin causes 5 joules of its kinetic energy to be converted to thermal energy. What is the velocity of the bowling ball after it rolls through the pin in meters per second? ​

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.

How are positive ions different from neutral atoms

What is part of a line has one endpoint and continues in one direction?