An object hangs in a dynamometer. It shows 1.2 N. When the object is immersed in a measuring glass with water, the water surface rises from 60 ml to 90 ml. a) Calculate the density of the object.
b) How big is the lifting force?

What statements accurately describe atoms

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

What are two different ways you could find the value of a? explain these methods.