As shown, a weight of mass 5 kg is situated on a piston of diameter D1 = 120 mm. Th e piston rides on a reservoir of oil of depth h1 = 42 mm and specifi c gravity SG = 0.8. Th e reservoir is connected...

As shown, a weight of mass 5 kg is situated on a piston of diameter D1 = 120 mm. Th e piston rides on a reservoir of oil of depth h1 = 42 mm and specifi c gravity SG = 0.8. Th e reservoir is connected to a round tube of diameter D2 = 5 mm, and oil rises in the tube to height h2. Find h2. Assume the oil in the tube is open to atmosphere, and neglect the weight of the piston.