1. A student pushes against a wall with 20 N of force and the wall does not move. In this situation, the
wall exerts -
A.

A.20 N of force in the same direction as the push.
B.20 N of force in the opposite direction of the push.
C. less than 20 N of force.
D. more than 20 N of force.

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.