Question 1

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) the density of water. 
B) 1.5 times the density of water. 
C) 2.5 times the density of water. 
D) 3.5 times the density of water. 
E) none of the above 
A) the density of water. 
B) 1.5 times the density of water. 
C) 2.5 times the density of water. 
D) 3.5 times the density of water. 
E) none of the above

Question 2

Which will remain the same for two identical books, one lying flat and the other standing on an end?

Accepted Answer

A) weight 
B) pressure 
C) both of these 
D) neither of these 
A) weight 
B) pressure 
C) both of these 
D) neither of these

Question 3

The mass of a cubic meter of water is

Accepted Answer

A) 1 kg. 
B) 10 kg. 
C) 100 kg. 
D) 1000 kg. 
E) 9800 N. 
A) 1 kg. 
B) 10 kg. 
C) 100 kg. 
D) 1000 kg. 
E) 9800 N.

Question 4

When a large floating ice cube with unfrozen water inside melts, the water level in its container

Accepted Answer

A) goes down. 
B) remains unchanged. 
C) goes up. 
A) goes down. 
B) remains unchanged. 
C) goes up.

Question 5

A key feature of the Falkirk Wheel in Scotland is that opposite gondolas have the same weight when both are brim-full of water

Accepted Answer

A) and boats in each have about equal weights. 
B) and at least one boat is in each gondola. 
C) regardless of the weights of boats or no boats in each. 
D) none of the above 
A) and boats in each have about equal weights. 
B) and at least one boat is in each gondola. 
C) regardless of the weights of boats or no boats in each. 
D) none of the above

Question 6

The fact that the weight of a brim-full container of water is unchanged whether or not something floats in it is nicely employed in

Accepted Answer

A) hydraulic devices. 
B) all floating devices. 
C) Scotland's Falkirk Wheel. 
D) none of the above 
A) hydraulic devices. 
B) all floating devices. 
C) Scotland's Falkirk Wheel. 
D) none of the above

Question 7

If you float a piece of wood in a container half-full of water that rests on a weighing scale, the weight reading on the scale will

Accepted Answer

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

Question 8

When an ice cube in a glass of water melts, the water level

Accepted Answer

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

Question 9

Compared to the density of water, the density of a fish is

Accepted Answer

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

Question 10

A mountain that floats on the mantle indicates that the density of the mantle is

Accepted Answer

A) less than that of the mountain. 
B) about the same as that of the mountain. 
C) greater than that of the mountain. 
D) none of the above 
A) less than that of the mountain. 
B) about the same as that of the mountain. 
C) greater than that of the mountain. 
D) none of the above

Question 11

The pascal is a pressure unit equal to

Accepted Answer

A) 1 newton per square meter. 
B) 1 kilogram per square meter. 
C) 1 newton per square centimeter. 
D) 1 kilogram per square centimeter. 
A) 1 newton per square meter. 
B) 1 kilogram per square meter. 
C) 1 newton per square centimeter. 
D) 1 kilogram per square centimeter.

Question 12

The amount of water displaced by a liter-sized block of ordinary wood floating in water is

Accepted Answer

A) less than 1 liter. 
B) 1 liter. 
C) more than 1 liter. 
D) depends on the water density 
E) none of the above 
A) less than 1 liter. 
B) 1 liter. 
C) more than 1 liter. 
D) depends on the water density 
E) none of the above

Question 13

Pumice is a volcanic rock that floats, which means its density is

Accepted Answer

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

Question 14

When an object is partly or wholly immersed in a liquid, it is buoyed up

Accepted Answer

A) by a force equal to its own weight. 
B) by a force equal to the weight of liquid displaced. 
C) and floats in accord with Archimedes' principle. 
D) all of the above 
E) none of the above 
A) by a force equal to its own weight. 
B) by a force equal to the weight of liquid displaced. 
C) and floats in accord with Archimedes' principle. 
D) all of the above 
E) none of the above

Question 15

When you place a stick in water and remove it, the stick is wet. If you instead place it in mercury the opposite occurs. The stick is dry. This is because adhesive forces are greater

Accepted Answer

A) between stick and water. 
B) between the stick and mercury. 
C) between the mercury and the water. 
D) none of the above 
A) between stick and water. 
B) between the stick and mercury. 
C) between the mercury and the water. 
D) none of the above

Question 16

If a battleship sinks in a canal lock, the water level in the lock will

Accepted Answer

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

Question 17

A person floats higher in the dense water of the Dead Sea because

Accepted Answer

A) less volume of water is displaced. 
B) more volume of water is displaced. 
C) of a greater buoyant force. 
A) less volume of water is displaced. 
B) more volume of water is displaced. 
C) of a greater buoyant force.

Question 18

To multiply an applied force while using a simple hydraulic lift, your force should be applied to the

Accepted Answer

A) large-diameter piston. 
B) small-diameter piston. 
C) relative piston sizes don't matter. 
A) large-diameter piston. 
B) small-diameter piston. 
C) relative piston sizes don't matter.

Question 19

Two life preservers have identical volumes, one filled with Styrofoam and the other filled with sand. When the two life preservers are worn by swimmers, one swimmer floats with part of the preserver above water, and the other swimmer sinks. In this case the buoyant force is greater on the life preserver filled with

Accepted Answer

A) Styrofoam. 
B) sand. 
C) same for both 
A) Styrofoam. 
B) sand. 
C) same for both

Question 20

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

Accepted Answer

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

Exam 13: Liquids

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

Which will remain the same for two identical books, one lying flat and the other standing on an end?

The mass of a cubic meter of water is

When a large floating ice cube with unfrozen water inside melts, the water level in its container

A key feature of the Falkirk Wheel in Scotland is that opposite gondolas have the same weight when both are brim-full of water

The fact that the weight of a brim-full container of water is unchanged whether or not something floats in it is nicely employed in

If you float a piece of wood in a container half-full of water that rests on a weighing scale, the weight reading on the scale will

When an ice cube in a glass of water melts, the water level

Compared to the density of water, the density of a fish is

A mountain that floats on the mantle indicates that the density of the mantle is

The pascal is a pressure unit equal to

The amount of water displaced by a liter-sized block of ordinary wood floating in water is

Pumice is a volcanic rock that floats, which means its density is

When an object is partly or wholly immersed in a liquid, it is buoyed up

When you place a stick in water and remove it, the stick is wet. If you instead place it in mercury the opposite occurs. The stick is dry. This is because adhesive forces are greater

If a battleship sinks in a canal lock, the water level in the lock will

A person floats higher in the dense water of the Dead Sea because

To multiply an applied force while using a simple hydraulic lift, your force should be applied to the

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

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