Sally and Bob are mopping the same size floor with the same force of 28 N on the mop. Distance covered was 31 meters. Sally finishes in 15 minutes and Bob does it in 18 minutes. Calculate the work done by Sally and Bob in Joules.

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.

Are good conductors of heat also good conductors of electricity? explain your answer.

Meaning of a nonzero y-intercept to a graph of reaction distance versus speed