If tje object is placed pf the focus of a concave mirror the image is formed​

Modify the equation fδt=δ (mv) to find the force of friction.

What is the major limitation to the light microscope?

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 %.