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Atmospheric pressure decreases with increasing _______. |
altitude |
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A column of mercury 76 cm tall has a weight that is equal to _______. |
that of a column of water 10.3 meters tall |
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When a party balloon is compressed to one-third its volume, gas pressure in the balloon _______. |
triples |
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A 1-kg balloon at equilibrium in the air is buoyed up with a force of _______. |
10 newtons |
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A helium-filled balloon will reach its maximum altitude when _______. |
its weight equals the weight of displaced air |
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When the speed of a fluid increases, internal pressure in the fluid _______. |
decreases |
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The air in this room has |
all of these: mass, energy, weight. |
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Airplane flight best illustrates |
Bernoulli’s principle. |
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The main difference between gases and plasmas has to do with |
electrical conduction. |
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Most of the matter in the universe is in the |
plasma state. |
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The faster a fluid moves, the |
less its internal pressure. |
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Suspend a pair of Ping-Pong balls from two strings so there is a small space between them. If you blow air between the balls, they will swing |
toward each other. |
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Which of the following bodies is comprised mostly of plasma? |
Sun |
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A one-ton blimp hovers in the air. The buoyant force acting on it is |
one ton. |
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When gas in a container is squeezed to half its volume and the temperature remains the same, the gas pressure |
doubles. |
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In a vacuum, an object has no |
buoyant force. |
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Atmospheric molecules do not fly off into outer space because of |
Earth gravitation. |
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In drinking soda or water through a straw, we make use of |
atmospheric pressure. |
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In a vacuum a marshmallow becomes |
larger. |
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About how high can water be theoretically lifted by a vacuum pump at sea level? |
10.3 m |
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Compared to the buoyant force of the atmosphere on a 1-liter helium-filled balloon, the buoyant force of the atmosphere on a nearby 1-liter solid iron block is |
the same. |
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A bubble of air released from the bottom of a lake |
becomes larger as it rises. |
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The flight of a blimp best illustrates |
the principle of Archimedes. |
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A suction cup sticks to a wall. It is |
pushed to the wall by the atmosphere. |
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When gas in a container is squeezed to half its volume, its density |
doubles. |
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A balloon is buoyed up with a force equal to the |
weight of air it displaces. |
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As a helium-filled balloon rises in the air, it becomes |
bigger. |
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Alcohol is less dense than water. If alcohol is used to make a barometer on a day when atmospheric pressure is normal, the height of the alcohol column would be |
more than 10.3 m. |
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Compared to the buoyant force of the atmosphere on a 1-kilogram helium-filled balloon, the buoyant force of the atmosphere on a nearby 1-kilogram solid iron block is |
considerably less. |
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The energy source responsible for the motion of molecules that make up the atmosphere is |
solar power. |
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It would be easier to pull evacuated Magdeburg hemispheres apart when they are |
20 km above the ocean surface. |
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What change in pressure occurs in a party balloon that is squeezed to one-third its volume with no change in temperature? |
The pressure will increase to three times its original pressure. |
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A plasma differs from a gas in that |
it is electrically conducting. |
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A large block of wood and a smaller block of iron on weighing scales both register the same weight – 1 ton. Taking buoyancy of air into account, which has the greater mass? |
wood |
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Suppose you are standing on a weighing scale and all of a sudden the atmosphere vanished. The reading on the scale would |
increase. |
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The weight of a 1-square-meter column of air that extends from sea level to the top of the atmosphere is |
101,000 N. |
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A helium-filled balloon released in the atmosphere will rise until |
the balloon and surrounding air have equal densities. |
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Consider two mercury barometers, one with twice the cross-sectional area of the other. Neglecting capillarity, mercury in the smaller tube will rise |
the same height as in the larger tube. |
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A column that extends from sea level to the top of the atmosphere contains a certain mass of air. If the same column instead had the same mass of water in it, the height of the water column would be |
10.3 meters. |
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A column that extends from sea level to the top of the atmosphere contains a certain mass of air. If the same column instead had the same mass of mercury in it, the height of the mercury column would be |
about 3/4 meter. |
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Compared to all liquids, solids, and gases in the universe, plasmas are the most |
abundant. |
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