Physics Chapter 15

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question
At a certain depth in the ocean, the absolute pressure is p. If you go to twice that depth (treating the water as incompressible)
the absolute pressure will be less than 2p
question
If you double the pressure on the surface of a can of water, the buoyant force on a stone placed in that water will
not change
question
Diagram: Fluid fills the container shown in the figure. At which of the indicated points is the pressure greatest?
the pressure is the same at each of the labeled points
question
A cup of water containing an ice cube at 0°C is filled to the brim. The tip of the ice cube sticks out of the surface. As the ice melts, you observe that
the water level remains the same
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Salt water is more dense than fresh water. A ship floats in both fresh water and salt water. Compared to the fresh water, the volume of salt water displaced by the ship is
less than the volume of fresh water
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A 50-cm3 block of wood is floating partially submerged in water, and a 50-cm3 block of iron is totally submerged in water. Which block has the greater buoyant force on it?
the iron
question
A rock is under water in a shallow lake. As the rock sinks deeper and deeper into water, the buoyant force on it
remains constant
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A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. If the top piece is taken off and placed in the water, what happens to the water level in the tub?
it does not change
question
Water flows through a pipe having a varying width. More water flows per second through the wide section than through the narrow section because there is more room for it to flow.
false
question
As the speed of a moving fluid increases, the pressure in the fluid
decreases
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When you blow some air above the upper face of a paper strip, the paper rises. This occurs because
the air above the upper face of the paper moves faster, which makes the pressure lower than at the lower face
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You are driving a late model convertible car at the 65 mph speed limit with its soft flexible roof closed up and the windows closed. You observe that the roof
bows outward
question
Tensile stress is