Water has a density of I000 kg/m^3\'. Mercury has a density of 13, 600 kg/m^3. A
ID: 2076009 • Letter: W
Question
Water has a density of I000 kg/m^3'. Mercury has a density of 13, 600 kg/m^3. A full container of water has the same mass as a full container of mercury. Which of the following is true? a. The container of water has a bigger volume b. The container of water has a smaller volume c. The container of water weighs more d. The container of mercury weighs more In the picture of the U-tube, the left side is open to the air. The right side is closed, and the substances in the U-tube are labeled. Which horizontal line shows where the pressures are equal on each side of the tube? A block of Styrofoam and a block of gold are each 10 cm^3. They are each held under water. When they are released, the Styrofoam rises to the surface and the gold sinks to the bottom. While they are still completely submerged underwater. a. the buoyant force on the styrofoam is equal to the buoyant force on the gold b. the buoyant force on the styrofoam is greater than the buoyant force on the gold c. the buoyant force on the styrofoam is less than the buoyant force on the gold Water flows through a pipe of area A with speed of v. Later, the pipe changes its size, and the speed is 1/2 v. What is the cross-sectional area of the pipe at this point? a. 2A b. A/2 c. 4A d. A/4 If the speed of water in a pipe stays constant as it goes up a hill, where is the pressure the highest? a. At the top of the hill b. at the bottom of the hill c. the pressure is the same everywhereExplanation / Answer
1. If container is same, same mass of water and Mercury is in each container, weight of both will be samr but volume of mercury in container will be less than volume of water in continer and by 13.6times.
Volume of water will be 13.6times more.
2. As liquids are stable in U tube, (D) has same pressure on both sides.
On left side, pressure is (Po) , atmospheric pressure, anand hdg,due to small colun of water above D level .
On right, pressure is h'doil*g + h"dwaterg.
3. Byuyant force is equal to weight of body.
As density of soyfoam is less, less buoyancy acts on soyfoam.
4.Equation of continuity: A*V = a*v, v=V/2,
So, a= 2A.
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