True/False --- Indicate whether the statement is true or false.
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1.
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On Earth, a pound of feathers has the same weight as a pound of lead.
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2.
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The relationship between the mass and volume of an object is its weight.
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3.
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The volume of an object is due to the space taken up by atoms of the object.
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4.
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Matter that has the ability to flow is called a fluid.
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5.
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When the buoyant force on a ball is less than the weight of the ball, the ball will float.
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6.
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A block of plastic is dropped into a tub of water. If the buoyant force on the block is greater than the weight of the block, the block will float.
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7.
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Buoyancy states that less dense objects will float in more dense liquids.
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8.
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If you weigh 90 kg on earth you would also weigh 90 kg on Jupiter since your mass does not change when you are in a different gravity environment.
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9.
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A newton is a measurement of mass on other planets that have a different gravitational pull, but we don’t really use it on Earth.
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Multiple Choice -- Identify the choice that best completes the statement.
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10.
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The space that an object takes up is known as its:
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a.
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density. |
b.
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volume. |
c.
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weight. |
d.
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mass. |
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11.
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The density of an object equals its:
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a.
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mass ÷ volume. |
b.
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mass ´ volume. |
c.
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volume ÷ mass. |
d.
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volume + mass. |
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12.
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| Material |
Density |
| Wood |
0.9 g/cm3
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| Glass |
2.3 g/cm3
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| Aluminum |
2.7 g/cm3
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| Iron |
7.8 g/cm3
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A block has a mass of 78 grams and a volume of 10 cm 3. Using the table above, what material is the block made of?
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a.
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Wood |
b.
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Glass |
c.
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Aluminum |
d.
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Iron |
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13.
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By adding more aluminum to an aluminum block, you:
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a.
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increase its density. |
b.
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decrease its density. |
c.
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decrease its mass. |
d.
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do not change its density. |
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14.
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Mass is measured in:
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a.
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inches and feet. |
b.
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pounds and ounces. |
c.
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kilograms and grams. |
d.
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cubic centimeters. |
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15.
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Which of the following measures the pulling force of gravity on an object?
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a.
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Volume |
b.
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Weight |
c.
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Mass |
d.
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Distance |
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16.
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What is the volume of this box with dimensions of 5 cm ´ 3 cm ´ 2 cm?
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a.
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10 cm |
b.
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10 cm3 |
c.
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30 cm |
d.
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30 cm3 |
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17.
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Matter that has the ability to flow is a:
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a.
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fluid. |
b.
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gas. |
c.
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liquid. |
d.
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All of the above |
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18.
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The lifting force that causes an object to float is known as:
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a.
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density. |
b.
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buoyancy. |
c.
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volume. |
d.
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fluidity. |
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19.
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Density is typically measured in which SI units?
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a.
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g/cm |
b.
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g/cm2 |
c.
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g/cm3 |
d.
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g/cm4 |
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Figure 5-1A
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20.
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If the buoyant force on the ball in Figure 5-1A is greater than the weight of the ball, the ball will:
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a.
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float. |
b.
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sink. |
c.
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have neutral buoyancy. |
d.
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float and then sink. |
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21.
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If the buoyant force on the ball in Figure 5-1A is less than the weight of the ball, then the ball will:
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a.
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float. |
b.
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sink. |
c.
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have neutral buoyancy. |
d.
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float then sink. |
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22.
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If the buoyant force on the ball in Figure 5-1A equals the weight of the ball, the ball will:
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a.
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float. |
b.
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sink. |
c.
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have neutral buoyancy. |
d.
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float then sink. |
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23.
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If an object is less dense than the fluid it is placed in, it will:
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a.
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sink. |
b.
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float. |
c.
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drift in the middle of the fluid. |
d.
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dissolve in the fluid. |
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24.
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If an object with a density of 2.0 g/cm3 is placed in a fluid with a density of 1.9 g/cm3, the object will:
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a.
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float. |
b.
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sink. |
c.
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have neutral buoyancy. |
d.
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dissolve in the fluid. |
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25.
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If an object in a tank of water has neutral buoyancy, you can conclude that:
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a.
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the object is denser than water. |
c.
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the object’s density is equal to that of the water. |
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b.
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the object is less dense than water. |
d.
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No conclusion can be made. |
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26.
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If the force of gravity on Jupiter is greater than the force of gravity on Earth, how would your mass on Jupiter compare to your mass on Earth?
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a.
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It would be greater. |
c.
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It would be the same. |
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b.
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It would be less. |
d.
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You can’t tell without the numbers. |
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27.
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If the force of gravity on the moon is less than the force of gravity on Earth, how would your weight on the moon compare to your weight on Earth?
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a.
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It would be greater. |
c.
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It would be the same. |
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b.
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It would be less. |
d.
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You can’t tell without the numbers. |
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28.
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Calculate: What is the density of a gold ring that has a volume of 1.55 cm3 and a mass of 29.95 g?
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a.
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0.5 g/cm3 |
b.
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4.65 g/cm3 |
c.
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19.3 g/cm3 |
d.
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21.7 g/cm3 |
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29.
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How does the density of a thin copper wire compare to a copper ring?
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a.
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It is higher. |
c.
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It is the same. |
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b.
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It is lower |
d.
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You can’t tell without the numbers. |
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30.
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In order to change the density of an object, you must:
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a.
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change its mass. |
c.
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change its mass OR volume. |
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b.
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change its volume. |
d.
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change its shape. |
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31.
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When an object’s volume is made smaller and its mass remains the same, its density:
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a.
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increases. |
c.
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remains the same. |
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b.
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decreases. |
d.
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increases then decreases. |
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32.
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High-density objects have:
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a.
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a large volume for their mass. |
c.
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a large volume for their temperature. |
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b.
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a small volume for their mass. |
d.
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a small volume for their temperature. |
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33.
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If a low-density object is placed in a high-density fluid, the object will:
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a.
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be able to push aside fluid equal to its mass. |
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b.
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not be able to push aside fluid equal to its mass. |
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c.
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increase in density. |
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d.
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decrease in density. |
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34.
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Which of the following is NOT a fluid?
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a.
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Helium gas |
b.
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Maple syrup |
c.
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Brick |
d.
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Water |
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35.
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Calculate: A golf ball has a mass of 45.7 g. Its volume is 41 mL. What is its density?
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a.
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1.11 g/mL |
b.
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86.7 g/cm3 |
c.
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4.7 g/cm3 |
d.
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1.11 g/cm3 |
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36.
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Calculate: A racketball has a mass of 40.6 g. Its volume is 47.7 cm3. What is its density?
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a.
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88.3 g/cm3 |
b.
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1936.62 g/cm3 |
c.
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7.1 g/cm3 |
d.
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.85 g/cm3 |
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37.
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An apple has a mass of 160.25 grams. Its volume is 163 mL. Does it sink or float in water?
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a.
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sink |
c.
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suspended below the surface |
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b.
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float |
d.
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I have no idea! |
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38.
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A lime has a mass of 88.05 grams. Its volume is 87 mL. Does it sink or float in water?
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a.
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float |
c.
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suspended below the surface |
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b.
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sink |
d.
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I have no idea! |
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Matching
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| a. |
density |
d. |
buoyancy |
g. |
displacement |
j. |
weight |
m. |
g/mL |
| b. |
mass |
e. |
float |
h. |
newton |
k. |
suspension |
n. |
atoms |
| c. |
volume |
f. |
sink |
i. |
neutral buoyuancy |
l. |
g/cm3
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o. |
density column |
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39.
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The relationship between the mass and volume of an object is called.....
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40.
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If an object is less dense than the fluid it is placed in, it will .....
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41.
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______ is created as fluid surrounds an object.
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42.
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The pulling force of gravity affects the measurement of .....
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43.
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On Jupiter you would need to measure weight using this unit .....
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44.
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A scuba diver needs to be able to float suspended in water. This is called ....
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45.
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Length (x) width (x) height = ?
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46.
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An object with a density of 1.5 g/mL would ______ in water.
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47.
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Adding more aluminum to a block of aluminum changes its mass and _____
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48.
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The density unit of measurement used with a displacement tank is ______
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| a. 0.19 g/mL |
c. 0.79 g/mL |
e. 1.33 g/cm3
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g. 2.79 g/cm3
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| b. 0.5 g/mL |
d. 0.9 g/mL |
f. 8.9 g/cm3
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Consider this tank of water with 7 objects. 4 are floating. 3 have sunk to the bottom.
Match the densities listed above to the apparent behavior of the objects.
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49.
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If object #5 sank the quickest of the three colored objects. What is its density?
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50.
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Identify the probable density of object #1.
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51.
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If object #7 was the last one to sink to the bottom, identify its density.
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52.
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Identify the probable density of object #4.
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53.
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Identify the probably density of object #2.
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54.
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Identify the probably density of object #3
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55.
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Object #6 had the second fastest sink time. What is its density?
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