a motorcycle moving at constant velocity suddenly accelerates at a rote of 4.0m/s^2 to a speed of 35m/s in 5.0s . What was the initial speed of the motorcycle?

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Why don't you see your reflection in water with waves or repples

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions