20.An open bottle is filled with a liquid which is flowing out trough a spigot located at the distance hbelow the surface of the liquid. What is the velocity of the liquid leaving the bottle? (A) √2gh(B) 2gh (C) 4gh (D) ρgh
21.A table surface of area A is placed underwater in a tank at a depth H relative to the surface of the water. A toy submarine is placed into the water and it sinks onto the table. If the submarine has a mass that cannot be ignored, and the amount of water displaced from the tank is Mw, what is the pressure on the table surface?
AMulti-correct Section: For each question or incomplete statement, two of the answers are correct. For each questions you must select both answers.22.A student wishes to test which things will float on olive oil. Olive oil has a specific gravity of 0.70.The following are specific gravities of various substances. Which will float on olive oil? Select two answers.
23.Two boxes lie on a table top: a 2 N box with a volume of 5 x 6 x 4 cm3and a 3 N box with a volume of 4 x 5 x 9 cm3. Which two arrangements will exert the same pressure? Select two answers.