A projectile is shot horizontally at 23.4 m/s from the roof of a building 55.0 m tall. a. Determine the time necessary for the projectile to reach the ground below.
b. Determine the distance from the base of the building that the projectile lands.
c. Determine the horizontal and vertical components of the velocity just before the projectile
reaches the ground

A 2-kg ball is moving with a constant speed of 5 m/s in a horizontal circle whose radius is 50 cm.
a. What is the acceleration of the ball? [1 mark]
b. What is the magnitude of the net force on the ball?

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)