The two 2-kg gears a and b are attached to the ends of a 5-kg slender bar. the gears roll within the fixed ring gear c, which lies in the horizontal plane. if a 10-n*m torque is applied to the center of the bar as shown, determine the number of revolutions the bar must rotate starting from rest in order for it to have an angular velocity of w_ab = 20 rad/s. for the calculation, assume the gears can be approximated by thin disks. what is the result if the gears lie in the vertical plane?

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.