Question 1

When a load of wood is thrown overboard from a boat in a swimming pool, the pool level

Accepted Answer

A) rises. 
B) falls. 
C) remains unchanged. 
A) rises. 
B) falls. 
C) remains unchanged.

Question 2

Buoyant force is greater on a submerged 1-cubic centimeter block of

Accepted Answer

A) lead. 
B) aluminum. 
C) same on each 
A) lead. 
B) aluminum. 
C) same on each

Question 3

If a weighted air-filled balloon sinks in deep water, it will

Accepted Answer

A) likely sink to an equilibrium level before reaching bottom. 
B) likely burst if water pressure is great enough. 
C) be acted on by a continuously decreasing buoyant force. 
D) none of the above 
A) likely sink to an equilibrium level before reaching bottom. 
B) likely burst if water pressure is great enough. 
C) be acted on by a continuously decreasing buoyant force. 
D) none of the above

Question 4

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 5

Buoyant force is greater on a submerged 10-newton block of

Accepted Answer

A) lead. 
B) aluminum. 
C) same on each 
A) lead. 
B) aluminum. 
C) same on each

Question 6

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

Accepted Answer

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

Question 7

The reason a life jacket helps keep you afloat is

Accepted Answer

A) the jacket makes you weigh less. 
B) the jacket has the same density as an average human. 
C) the jacket repels water. 
D) if you sink, the jacket sinks. 
E) the density of both you and the jacket together is less than your density alone. 
A) the jacket makes you weigh less. 
B) the jacket has the same density as an average human. 
C) the jacket repels water. 
D) if you sink, the jacket sinks. 
E) the density of both you and the jacket together is less than your density alone.

Question 8

A block of wood with a piece of iron tied to the top of it floats in a bucket of water. If the wood and iron are turned over so that the iron is submerged beneath the wood, the water level at the side of the bucket

Accepted Answer

A) rises. 
B) falls. 
C) remains the same. 
A) rises. 
B) falls. 
C) remains the same.

Question 9

If you float a piece of wood in a container brim-full of water that rests on a weighing scale, some water will spill. Then the weight reading on the scale will

Accepted Answer

A) decrease. 
B) remain unchanged. 
C) increase. 
A) decrease. 
B) remain unchanged. 
C) increase.

Question 10

Two life preservers have identical volumes, but one is filled with Styrofoam while the other is filled with sand. When the two life preservers are fully submerged, the buoyant force is greater on the one filled with

Accepted Answer

A) Styrofoam. 
B) sand. 
C) same on each as long as their volumes are the same 
A) Styrofoam. 
B) sand. 
C) same on each as long as their volumes are the same

Question 11

A 5-N block of wood is difficult to fully submerge in a pool of mercury because the buoyant force on the block when submerged is

Accepted Answer

A) less than 5 N. 
B) 5 N. 
C) much more than 5 N. 
A) less than 5 N. 
B) 5 N. 
C) much more than 5 N.

Question 12

A consequence of surface tension for water is

Accepted Answer

A) capillary action. 
B) wet sand being firmer than dry sand. 
C) the different tastes of hot and cold oily soup. 
D) all of the above 
E) none of the above 
A) capillary action. 
B) wet sand being firmer than dry sand. 
C) the different tastes of hot and cold oily soup. 
D) all of the above 
E) none of the above

Question 13

An ice cube with large air bubbles in it floats in a brim-full container of water. When the ice cube melts,

Accepted Answer

A) water spills over. 
B) no change in water level occurs. 
C) water level in the container goes down. 
A) water spills over. 
B) no change in water level occurs. 
C) water level in the container goes down.

Question 14

A dam is thicker at the bottom than at the top mainly because

Accepted Answer

A) water is denser at deeper levels. 
B) water pressure increases with depth. 
C) surface tension exists only on the surface of liquids. 
D) it looks better. 
E) none of the above 
A) water is denser at deeper levels. 
B) water pressure increases with depth. 
C) surface tension exists only on the surface of liquids. 
D) it looks better. 
E) none of the above

Question 15

The concept of pressure involves both

Accepted Answer

A) force and volume. 
B) force and area. 
C) area and volume. 
A) force and volume. 
B) force and area. 
C) area and volume.

Question 16

When scrap iron in a boat is thrown overboard in a swimming pool, the pool level

Accepted Answer

A) rises. 
B) falls. 
C) remains unchanged. 
A) rises. 
B) falls. 
C) remains unchanged.

Question 17

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 is the more likely scenario?

Accepted Answer

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

Question 18

A fish normally displaces its own

Accepted Answer

A) volume of water. 
B) weight of water. 
C) both of these 
D) neither of these 
A) volume of water. 
B) weight of water. 
C) both of these 
D) neither of these

Exam 13: Liquids

When a load of wood is thrown overboard from a boat in a swimming pool, the pool level

Buoyant force is greater on a submerged 1-cubic centimeter block of

If a weighted air-filled balloon sinks in deep water, it will

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

Buoyant force is greater on a submerged 10-newton block of

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

The reason a life jacket helps keep you afloat is

A block of wood with a piece of iron tied to the top of it floats in a bucket of water. If the wood and iron are turned over so that the iron is submerged beneath the wood, the water level at the side of the bucket

If you float a piece of wood in a container brim-full of water that rests on a weighing scale, some water will spill. Then the weight reading on the scale will

Two life preservers have identical volumes, but one is filled with Styrofoam while the other is filled with sand. When the two life preservers are fully submerged, the buoyant force is greater on the one filled with

A 5-N block of wood is difficult to fully submerge in a pool of mercury because the buoyant force on the block when submerged is

A consequence of surface tension for water is

An ice cube with large air bubbles in it floats in a brim-full container of water. When the ice cube melts,

A dam is thicker at the bottom than at the top mainly because

The concept of pressure involves both

When scrap iron in a boat is thrown overboard in a swimming pool, the pool 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 is the more likely scenario?

A fish normally displaces its own

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