. How much work has gravity done on a 2.0 kg ball done in the first 3.5 seconds after being dropped?

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

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 %.

Describe cytokinesis in plants and animals. in animals: in plants.