If you leave your desk, walk 25 meters west down A hall, turn left and head 55 meters south down B hall, turn left again and head 15 meters east down D hall, turn left and head 55 m
north up B hall, turn right and head 10 m east down A hall and return to your seat, what is
the magnitude of your displacement?

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?