One end of a stretched ideal spring is attached to an airtrack and the other is attached to a glider with a mass of 0.360 kg. the glider is released and allowed to oscillate in shm. if the distance of the glider from the fixed end of the spring varies between 2.05 m and 1.06 m, and the period of the oscillation is 2.15 s, find the force constant of the spring, the maximum mass of the glider and the magnitude of the maximum acceleration of the glider.

True or false: the revolution of the earth creates day and night as it rotates around the sun

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.

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.