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      Ch 20 Gases Quiz on QuizRevolution

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      Ch 20 Gases Quiz
      myStudiyo Media
      Question
      1/45
      Ch 20 Gases Quiz
      Points for Question
      100
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      A spinning ball will curve because of ___.
      Wrong
       of players answered correctly.
      • an imbalance of pressure on the ball

      • an equalized pressure on the ball

      • an increase of air molecules in front of the ball

      • an increase of air molecules in back of the ball

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      Comments:
      1. A spinning ball will curve because of ___.
        1. an imbalance of pressure on the ball
        2. an equalized pressure on the ball
        3. an increase of air molecules in front of the ball
        4. an increase of air molecules in back of the ball
      2. There are more air molecules per cubic meter at greater altitudes
        1. true
        2. false
      3. The atmospheric pressure is uniform and does not change.
        1. true
        2. false
      4. Gas molecules are energized and kept in continual motion by _
        1. winds
        2. sun's energy
        3. weight of the air
        4. buoyant force
      5. The smooth paths, or trajectories of the bits of fluids are called ___.
        1. streamlines
        2. eddies
        3. air paths
        4. flow paths
      6. When air is compressed its density __.
        1. increases
        2. decreases
        3. remains the same
      7. The ___ keeps gas molecules from flying into outer space.
        1. gravity
        2. sun's energy
        3. weight of the air
        4. buoyant force
      8. The reason a shower curtain will pull to the inside of a bathtub during a shower is that -
        1. there is more air inside the curtain
        2. there is less air inside the curtain
        3. there is more pressure inside the curtain
        4. there is less pressure inside the curtain
      9. When you drink liquid from a straw, the liquid is sucked up the straw.
        1. true
        2. false
      10. The difference in the upward and downward force acting on a submerged block __.
        1. increases with increasing depth
        2. decreases with increasing depth
        3. is the same at any depth
      11. For a gas, density ___ with depth.
        1. increases
        2. decreases
        3. remains the same
        4. not enough info to say
      12. In a vacuum on earth, an object has no ___.
        1. buoyant force
        2. mass
        3. weight
        4. volume
      13. Pressure is ___ proportional to the density of air.
        1. directly
        2. indirectly
      14. On top of a mountain, pressure of the air is _ the pressure of air at sea level.
        1. greater than
        2. less than
        3. equal to
      15. What happens to the pressure between cars as they pass each other at high speeds?
        1. pressure increases
        2. pressure decreases
        3. pressure remains the same
        4. not enough info to say
      16. A bubble of air released from the bottom of a lake ___.
        1. rises to the top at a constant volume
        2. becomes smaller as it rises
        3. becomes larger as it rises
        4. alternately expands and contracts as it rises
      17. The net upward force produced by the difference between upward & downward pressures is
        1. lift
        2. thrust
        3. buoyant force
        4. steady flow
      18. . If you blow over the top of a piece of paper, the pressure above the paper__
        1. increases
        2. doubles
        3. decreases
        4. remains the same
      19. In order for flight to take place __.
        1. thrust is greater than drag
        2. thrust is less than drag
        3. thrust is equal to drag
        4. thrust is > or = to drag
      20. An umbrella tends to move upward on a windy day because ___
        1. air gets trapped under the umbrella pushing it up
        2. buoyancy increases with increasing wind speed
        3. wind pushes it up
        4. a low-pressure area is created on top of the umbrella
      21. When you drink from a straw, the atmospheric pressure pushes the drink up the straw
        1. true
        2. false
      22. The air at the bottom of a deep mine would have _ compared to air at sea-level
        1. a greater density
        2. a smaller density
        3. the same density
        4. not enough info to say
      23. An aneroid barometer can be used to indicate changes in _
        1. water pressure
        2. temperature
        3. oxygen levels in the atmosphere
        4. altitude
      24. When the speed of a fluid increases the pressure decreases is known as ___.
        1. archimede's principle
        2. bernoulli's principle
        3. boyle's principle
        4. pascal's principle
      25. Gas molecules inside a box are at constant temp. As the volume of increases, pressure _
        1. increases
        2. decreases
        3. remains the same
      26. In order for flight to take place__.
        1. lift is greater than weight
        2. lift is less than weight
        3. lift is equal to the weight
        4. lift is > or = to the weight
      27. For a gas at a constant temperature, the product of pressure & volume is a constant
        1. archimede's principle
        2. bernoulli's principle
        3. boyle's principle
        4. pascal's principle
      28. When a river narrows, the water in the river flows___.
        1. slower
        2. faster
        3. at the same rate
      29. It would __ to drink through a straw at the bottom of a deep mine.
        1. be easier
        2. be more difficult
        3. require the same effort
        4. not enough info to say
      30. A fluid can be either a gas or a liquid.
        1. true
        2. false
      31. If barometric pressure drops then the weather is going to ___.
        1. get worse
        2. get better
        3. stay the same
        4. not enough info to say
      32. What causes atmospheric pressure?
        1. winds
        2. sun's energy
        3. weight of the air
        4. ozone
      33. On a windy day, atmospheric pressure ___.
        1. increases
        2. decreases
        3. remains the same
      34. A submerged 1 liter container filled with mercury has a mass of 13.8 kg. Buoyant force is
        1. 1N
        2. 10N
        3. 100N
        4. 138N
      35. Greater buoyant force? a balloon filled w/ helium or the same size balloon filled w/air
        1. the helium balloon
        2. the air balloon
        3. neither: the have the same buoyant force
      36. An object surrounded by air is buoyed up by a force equal to ___.
        1. volume of air displaced
        2. weight of air displaced
        3. mass of air displaced
        4. temperature of air displaced
      37. Would a helium balloon rise if an astronaut let go of it on the surface of the moon
        1. yes it would rise
        2. no it would not rise
        3. it would hover/float at the point it was released
        4. not enough info to say
      38. This is used to describe the buoyant force that an object feels when surrounded by air.
        1. archimede's principle
        2. bernoulli's principle
        3. boyle's principle
        4. pascal's principle
      39. A firefighter’s hose is ___ when water is flowing through it compared to when water is not
        1. thicker (greater diameter)
        2. thinner (smaller diameter)
        3. the same size
      40. Relative to sea level, it would be ___to drink from a straw on top of a mountain
        1. easier
        2. more difficult
        3. just as easy
        4. impossible
      41. Pressure is ___ proportional to the volume of air.
        1. directly
        2. indirectly
      42. One small bit of fluid following along the same path as a bit of fluid in front of it is
        1. eddy
        2. streamline
        3. steady flow
        4. fluid flow
      43. Which has a larger buoyant force an elephant or a floating helium balloon on a string?
        1. elephant
        2. helium balloon
        3. neither- buoyant force is equal
        4. neither- for there is no buoyant force acting on them
      44. The main difference between gases and liquids is that in a gas ___
        1. molecules are moving faster
        2. forces between molecules are larger
        3. distances between molecules are larger
        4. molecules collide more often
      45. If you squeeze a balloon to one half its original size, the pressure inside___.
        1. increases by a factor of one half
        2. increases by a factor of 2
        3. decreases by a factor of one half
        4. decreases by a factor of 2
      Tags: education , science

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