Q: In a lecture demonstration, a professor pulls apart two hemispherical steel
In a lecture demonstration, a professor pulls apart two hemispherical steel shells (diameter D) with ease using their attached handles. She then places them together, pumps out the air to an absolute...
See AnswerQ: A cube of oak wood with very smooth faces normally floats in
A cube of oak wood with very smooth faces normally floats in water. Suppose you submerge it completely and press one face flat against the bottom of a tank so that no water is under that face. Will th...
See AnswerQ: The deepest point known in any of the earth’s oceans is in
The deepest point known in any of the earth’s oceans is in the Marianas Trench, 10.92 km deep. (a) Assuming water is incompressible, what is the pressure at this depth? Use the density of seawater. (b...
See AnswerQ: A swimming pool is 5.0 m long, 4.
A swimming pool is 5.0 m long, 4.0 m wide, and 3.0 m deep. Compute the force exerted by the water against (a) the bottom and (b) either end.
See AnswerQ: (a) As you can tell by watching them in an
(a) As you can tell by watching them in an aquarium, fish are able to remain at any depth in water with no effort. What does this ability tell you about their density? (b) Fish are able to inflate the...
See AnswerQ: The upper edge of a gate in a dam runs along the
The upper edge of a gate in a dam runs along the water surface. The gate is 2.00 m high and 4.00 m wide and is hinged along a horizontal line through its center (Fig. P12.55). Calculate the torque abo...
See AnswerQ: It has been proposed that we could explore Mars using inflated balloons
It has been proposed that we could explore Mars using inflated balloons to hover just above the surface. The buoyancy of the atmosphere would keep the balloon aloft. The density of the Martian atmosph...
See AnswerQ: A 0.180-kg cube of ice (frozen water
A 0.180-kg cube of ice (frozen water) is floating in glycerine. The gylcerine is in a tall cylinder that has inside radius 3.50 cm. The level of the glycerine is well below the top of the cylinder. If...
See AnswerQ: A narrow, U-shaped glass tube with open ends is
A narrow, U-shaped glass tube with open ends is filled with 25.0 cm of oil (of specific gravity 0.80) and 25.0 cm of water on opposite sides, with a barrier separating the liquids (Fig. P12.58). (a) A...
See AnswerQ: A U-shaped tube open to the air at both ends
A U-shaped tube open to the air at both ends contains some mercury. A quantity of water is carefully poured into the left arm of the U-shaped tube until the vertical height of the water column is 15.0...
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