A car pulls away from an intersection when the light turns green. After uniformly accelerating for the next 6.0 s, the car has traveled a distance of 75 m. The car then proceeds at a constant speed. ( /7) (a) What was the car's acceleration?
(b) How fast was the car traveling when it finished accelerating?
(c) How long will it take for the car to travel another 85 m at this constant speed?

Conventional hot-water heaters consist of a tank of water maintained at a fixed temperature. the hot water is to be used when needed. the drawback is that energy is wasted because the tank loses heat when it is not in use, and you can run out of hot water if you use too much. some utility companies are encouraging the use of on-demand water heaters (also known as flash heaters), which consist of heating units to heat the water as you use it. no water tank is involved, so no heat is wasted. a typical household shower flow rate is 2.50 gal/min (9.46 l/min ) with the tap water being heated from 51.0 ˚f (10.6 ˚c) to 120 ˚f (48.9 ˚c) by the on-demand heater.what rate of heat input (either electrical of from gas) is required to operate such a unit, assuming that all the heat goes into the water?