An unstable particle, initially at rest, decays into a proton (rest energy 938.3 mev) and a negative pion (rest energy 139.5 mev). a uniform magnetic field of 0.250 t exists perpendicular to the velocities of the created particles. the radius of curvature of each track is found to be 1.33 m. what is the mass of the original unstable particle?

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Which of the following is not am example of a polymer? protein nylon kevlar concreta

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.