A large rock falls off the edge of a cliff. Which of the following graphs best represents the rocks speed as a function of time as it falls from the cliff? Speed vs Time Speed vs Tíme (s)poods Spood(m/s) - 5 2 Time (s) Times) W. X. Speed vs Time Speed vs Time (su)poods 5 Time (s) Z. Y. CA. Z Св. Ү CC. X D. w​

Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.

What occurs during a combustion reaction

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)