Your older brother is driving at 35 km/h when the road suddenly descends 15 m into a valley. he takes his foot off the accelerator and coasts down the hill. just as he reaches the bottom you see a policeman hiding behind the speed limit sign that reads "70 km/h." is your brother going to get a speeding ticket?

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

The slope of a velocity time graph over any interval of time gives the during that interval

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.