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Q1. A .330 kg ball is held 2.80 m under water. When the ball is released, it rises with a constant acceleration and reaches the surface with the speed of .0740 m/s. ignore the friction between the ball and the water, what is the density of the ball?

Q2. A loudspeaker of mass 20.00 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.50 {rm m}.

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