The loaded trailer has a mass of 880 kg with center of mass at G and is attached at A to a rear-bumper hitch. If the car and trailer reach a velocity of 52 km/h on a level road in a distance of 32 m from rest with constant acceleration, compute the vertical component Ay of the force supported by the hitch at A. The vertical force Ay is positive if up, negative if down. Neglect the small friction force exerted on the relatively light wheels.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

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.