A 500kg car (mass of the car and riders) is at the top of a 28.5 m hill. Assuming no friction, what should the velocity of the car be at the bottom of the hill? Show your work with units.

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?