Auniform horizontal rod of mass mand length rotates with angular velocity about a vertical axis through its center. attached to each end of the rod is a small mass m. determine the angular momentum of the system about the axis. express your answer in terms of the variables, m ,l ,w and m.

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.