Two cars A and B are moving along straight road in the same direction with velocities of 25 km/hr and 40 km/hr respectively. Find the velocity of car B relative to car A

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

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 %.