1. If force increases while area stays the same, pressure will __________.
A) decrease
B) increase
C) be unchanged
D) go down
2. If an object has the same density as the fluid it is submerged in, the object will always
A) sink to the bottom of the fluid.
B) sink to the middle of the fluid.
C) float at any level in the fluid.
D) float on the top of the fluid.
3. Imagine that a cork is floating in salty water at a fixed depth. As more salt is added to the water to increase its density, the cork will
A) float at a higher level in the water.
B) float at a lower level in the water.
C) sink.
D) float at the same level in the water.
4. If pressure decreases while area remains the same, force has __________.
A) increased
B) decreased
C) not changed
D) doubled
5. As the speed of a fluid increases, the pressure within the fluid __________.
A) increases
B) decreases
C) is unchanged
D) rises quickly
6. What would cause a ship to sink in water?
A) The ship’s pressure becomes greater than its density
B) The ship’s weight becomes greater than the buoyant force acting on it
C) The ship’s weight becomes less than the buoyant force acting on it
D) The ship’s volume becomes greater than the buoyant force acting on it
7. A ball is floating partially submerged in a liquid. The buoyant force acting on the ball equals the
A) volume of the ball below the surface.
B) volume of the ball above the surface.
C) mass of the ball.
D) weight of the ball.
8. If area is increased while force remains the same, pressure will __________.
A) decrease
B) increase
C) be unchanged
D) go up
9. According to Pascal’s principle, which of the following is NOT possible?
A) Compressing 10 liters of oxygen gas into a 1-liter volume
B) Compressing 2 liters of water into a 1-liter volume
C) Filling a balloon using helium gas from a pressurized tank
D) Allowing 5 liters of compressed air to expand to a volume of 100 liters
10. Two identical test tubes are filled with equal volumes of water and mercury. According to Pascal’s principle, which of the following statements is true?
A) The weight of both liquids is the same.
B) Both water and mercury exert pressure in all directions.
C) The pressure at the bottom of both test tubes is the same.
D) All of the above.
11. The density of corn syrup is 1.38 g/cm3. Which of the following substances will float in corn syrup?
A) Copper (density = 8.9 g/cm3)
B) Silver (density = 10.5 g/cm3)
C) Iron (density = 7.8 g/cm3)
D) Glycerin (density = 1.26 g/cm3)
12. Oil is less dense than water, therefore oil __________ water.
A) sinks in
B) mixes well with
C) weight the same as
D) floats on
13. To calculate pressure exerted on a surface, what quantity is divided by surface area?
A) Altitude
B) Force
C) Mass
D) Volume
14. An object that floats in a fluid is __________ the fluid.
A) more dense than
B) less dense than
C) the same color as
D) the same weight as
15. Why does a helium-filled balloon float in the air?
A) the air is less dense than the helium
B) the air does not have density
C) the helium in the balloon is less dense than the air
D) the helium in the balloon is more dense than the air
16. Suppose an object is placed in a fluid. If the object is more dense than the fluid, the object
A) will float in the fluid.
B) is lighter than the fluid.
C) will sink in the fluid.
D) has the same mass as the fluid.
17. Where will the greatest increase in pressure occur if you squeeze the middle of an upright, closed soft-drink bottle?
A) The greatest increase in pressure will occur at the top of the bottle.
B) The greatest increase in pressure will occur in the middle of the bottle.
C) The greatest increase in pressure will occur on the bottom of the bottle.
D) The pressure will increase equally everywhere within the bottle.
18. Where is fluid pressure greatest?
A) 30 centimeters below the surface of a swimming pool
B) 1 meter below the surface of a swimming pool
C) 2 meters below the surface of a swimming pool
D) The pressure is the same in all parts of a swimming pool.
19. The buoyant force acting on a suspended object equals the object’s
A) weight.
B) size
C) shape
D) pressure
20. Two identical corks float in separate beakers. One beaker contains distilled water. The other contains very salty water, which is more dense than distilled water. Which of the following statements is true?
A) The corks float at the same level in both liquids.
B) The cork in the very salty water floats at a lower level than the other cork.
C) The corks will eventually sink.
D) The cork in the very salty water floats at a higher level than the other cork..