Question 1

Buoyant force is greatest on a submerged

Accepted Answer

A)  1-cubic centimeter block of aluminum. 
B)  1-cubic centimeter block of lead. 
C)  is the same on each 
A)  1-cubic centimeter block of aluminum. 
B)  1-cubic centimeter block of lead. 
C)  is the same on each

Question 2

A common 5-liter metal can will float in air if it is

Accepted Answer

A)  thrown high enough into the air. 
B)  evacuated of air. 
C)  filled with a very large amount of helium. 
D)  Nonsense! Unless the displaced air weighs more than the can and its contents, the can will not float in air. 
A)  thrown high enough into the air. 
B)  evacuated of air. 
C)  filled with a very large amount of helium. 
D)  Nonsense! Unless the displaced air weighs more than the can and its contents, the can will not float in air.

Question 3

A lobster crawls onto a bathroom scale submerged at the bottom of the ocean. Compared to its weight above the surface, the lobster will have an apparent weight under water that is

Accepted Answer

A)  greater. 
B)  less. 
C)  the same. 
A)  greater. 
B)  less. 
C)  the same.

Question 4

The ratio of output force to input force of a hydraulic press will be equal to the ratio of the output and input piston

Accepted Answer

A)  areas. 
B)  diameters. 
C)  radii. 
D)  all of these 
E)  none of these 
A)  areas. 
B)  diameters. 
C)  radii. 
D)  all of these 
E)  none of these

Question 5

If the part of an iceberg that extends above the water were suddenly removed, the

Accepted Answer

A)  buoyant force on the iceberg would decrease. 
B)  pressure on the bottom of the iceberg would increase. 
C)  iceberg would sink. 
D)  density of the iceberg would change. 
E)  none of these 
A)  buoyant force on the iceberg would decrease. 
B)  pressure on the bottom of the iceberg would increase. 
C)  iceberg would sink. 
D)  density of the iceberg would change. 
E)  none of these

Question 6

Atmospheric molecules do not fly off into outer space because of

Accepted Answer

A)  cohesive forces. 
B)  Earth gravitation. 
C)  their relatively low densities. 
D)  their relatively high speeds. 
A)  cohesive forces. 
B)  Earth gravitation. 
C)  their relatively low densities. 
D)  their relatively high speeds.

Question 7

An umbrella tends to move upwards on a windy day principally because

Accepted Answer

A)  air gets trapped under the umbrella, warms, and rises. 
B)  air pressure is reduced over the curved top surface. 
C)  buoyancy increases with increasing wind speed. 
D)  all of these 
A)  air gets trapped under the umbrella, warms, and rises. 
B)  air pressure is reduced over the curved top surface. 
C)  buoyancy increases with increasing wind speed. 
D)  all of these

Question 8

What is the weight of water displaced by a 100-ton floating ship?

Accepted Answer

A)  more than 100 tons 
B)  100 cubic meters 
C)  100 tons 
D)  less than 100 tons 
E)  depends on the ship's shape 
A)  more than 100 tons 
B)  100 cubic meters 
C)  100 tons 
D)  less than 100 tons 
E)  depends on the ship's shape

Question 9

When a boat sails from fresh water to salt water, the boat will float

Accepted Answer

A)  lower in the water. 
B)  higher in the water. 
C)  at the same water level. 
A)  lower in the water. 
B)  higher in the water. 
C)  at the same water level.

Question 10

A completely submerged object always displaces its own

Accepted Answer

A)  weight of fluid. 
B)  density of fluid. 
C)  volume of fluid. 
D)  all of these 
E)  none of these 
A)  weight of fluid. 
B)  density of fluid. 
C)  volume of fluid. 
D)  all of these 
E)  none of these

Question 11

About how high can water be theoretically lifted by a vacuum pump at sea level?

Accepted Answer

A)  more than 10.3 m 
B)  10.3 m 
C)  less than 10.3 m 
A)  more than 10.3 m 
B)  10.3 m 
C)  less than 10.3 m

Question 12

There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which of the following is most likely?

Accepted Answer

A)  The force on his finger would have been less than 1 N. 
B)  Although the force on his finger would have been huge, the pressure would have been small enough for this to occur. 
C)  The huge size of the Atlantic Ocean makes this impossible. 
D)  Both the force and pressure on his finger would have been great, but not too great for a public-spirited Dutch lad. 
E)  none of these 
A)  The force on his finger would have been less than 1 N. 
B)  Although the force on his finger would have been huge, the pressure would have been small enough for this to occur. 
C)  The huge size of the Atlantic Ocean makes this impossible. 
D)  Both the force and pressure on his finger would have been great, but not too great for a public-spirited Dutch lad. 
E)  none of these

Question 13

About what percentage of the molecules that make up the atmosphere are below an aircraft that flies at an altitude of 6 kilometers?

Accepted Answer

A)  30% 
B)  40% 
C)  50% 
D)  20% 
E)  more than 50% 
A)  30% 
B)  40% 
C)  50% 
D)  20% 
E)  more than 50%

Question 14

To multiply the input force of a hydraulic lift, the input end should be the one having the

Accepted Answer

A)  smaller diameter piston. 
B)  relative piston sizes don't matter. 
C)  larger diameter piston. 
A)  smaller diameter piston. 
B)  relative piston sizes don't matter. 
C)  larger diameter piston.

Question 15

A boat loaded with scrap iron floats in a swimming pool. When the iron is thrown overboard, the pool level will

Accepted Answer

A)  fall. 
B)  rise. 
C)  remain unchanged. 
A)  fall. 
B)  rise. 
C)  remain unchanged.

Question 16

Pumice is a volcanic rock that floats. Its density is

Accepted Answer

A)  equal to the density of water. 
B)  less than the density of water. 
C)  more than the density of water. 
A)  equal to the density of water. 
B)  less than the density of water. 
C)  more than the density of water.

Question 17

A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N when the rock is submerged. The density of the rock is

Accepted Answer

A)  1.5 times the density of water. 
B)  the density of water. 
C)  3.5 times the density of water. 
D)  2.5 times the density of water. 
A)  1.5 times the density of water. 
B)  the density of water. 
C)  3.5 times the density of water. 
D)  2.5 times the density of water.

Question 18

One liter of water has a mass of

Accepted Answer

A)  14.7 grams. 
B)  1 kilogram. 
C)  500 grams. 
D)  none of the above choices 
A)  14.7 grams. 
B)  1 kilogram. 
C)  500 grams. 
D)  none of the above choices

Question 19

Three icebergs are each floating in bathtubs filled to the brim with water. Iceberg A has large air bubbles in it. Iceberg B has unfrozen water in it. Iceberg C has an iron railroad spike in it. When the ice melts, what happens?

Accepted Answer

A)  The water level in C will decrease while the other two water levels will remain the same. 
B)  The water level in A will stay the same, while the other tubs will spill over. 
C)  Only the water in C will spill over. 
D)  All the tubs spill over. 
E)  All stay exactly the same. 
A)  The water level in C will decrease while the other two water levels will remain the same. 
B)  The water level in A will stay the same, while the other tubs will spill over. 
C)  Only the water in C will spill over. 
D)  All the tubs spill over. 
E)  All stay exactly the same.

Question 20

When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you float higher in the high- density water of the Dead Sea, the buoyant force that acts on you is

Accepted Answer

A)  greater than your weight. 
B)  equal to your weight. 
C)  less than your weight. 
A)  greater than your weight. 
B)  equal to your weight. 
C)  less than your weight.

Buoyant force is greatest on a submerged

A common 5-liter metal can will float in air if it is

A lobster crawls onto a bathroom scale submerged at the bottom of the ocean. Compared to its weight above the surface, the lobster will have an apparent weight under water that is

The ratio of output force to input force of a hydraulic press will be equal to the ratio of the output and input piston

If the part of an iceberg that extends above the water were suddenly removed, the

Atmospheric molecules do not fly off into outer space because of

An umbrella tends to move upwards on a windy day principally because

What is the weight of water displaced by a 100-ton floating ship?

When a boat sails from fresh water to salt water, the boat will float

A completely submerged object always displaces its own

About how high can water be theoretically lifted by a vacuum pump at sea level?

There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which of the following is most likely?

About what percentage of the molecules that make up the atmosphere are below an aircraft that flies at an altitude of 6 kilometers?

To multiply the input force of a hydraulic lift, the input end should be the one having the

A boat loaded with scrap iron floats in a swimming pool. When the iron is thrown overboard, the pool level will

Pumice is a volcanic rock that floats. Its density is

A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N when the rock is submerged. The density of the rock is

One liter of water has a mass of

Three icebergs are each floating in bathtubs filled to the brim with water. Iceberg A has large air bubbles in it. Iceberg B has unfrozen water in it. Iceberg C has an iron railroad spike in it. When the ice melts, what happens?

When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you float higher in the high- density water of the Dead Sea, the buoyant force that acts on you is

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Exam 7: Fluid Mechanics

Buoyant force is greatest on a submerged

A common 5-liter metal can will float in air if it is

A lobster crawls onto a bathroom scale submerged at the bottom of the ocean. Compared to its weight above the surface, the lobster will have an apparent weight under water that is

The ratio of output force to input force of a hydraulic press will be equal to the ratio of the output and input piston

If the part of an iceberg that extends above the water were suddenly removed, the

Atmospheric molecules do not fly off into outer space because of

An umbrella tends to move upwards on a windy day principally because

What is the weight of water displaced by a 100-ton floating ship?

When a boat sails from fresh water to salt water, the boat will float

A completely submerged object always displaces its own

About how high can water be theoretically lifted by a vacuum pump at sea level?

There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which of the following is most likely?

About what percentage of the molecules that make up the atmosphere are below an aircraft that flies at an altitude of 6 kilometers?

To multiply the input force of a hydraulic lift, the input end should be the one having the

A boat loaded with scrap iron floats in a swimming pool. When the iron is thrown overboard, the pool level will

Pumice is a volcanic rock that floats. Its density is

A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N when the rock is submerged. The density of the rock is

One liter of water has a mass of

Three icebergs are each floating in bathtubs filled to the brim with water. Iceberg A has large air bubbles in it. Iceberg B has unfrozen water in it. Iceberg C has an iron railroad spike in it. When the ice melts, what happens?

When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you float higher in the high- density water of the Dead Sea, the buoyant force that acts on you is

About Science

Atoms

Equilibrium and Linear Motion

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Temperature, Heat, and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light Waves

Properties of Light

Quantum Theory

The Atomic Nucleus and Radioactivity

Physics of Rotation and Equilibrium

Filters