A relaxed eye has a focal point of 25.2 mm causing farsightedness. What power of lens is required to correct the person's vision if the distance from the lens to the retina is 2.1 cm?

Explain what happens at the saturation point when adding salt to water at room temperature.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.