Deck 9: Mass and Mass-Related Variables in Engineering

Question 1

The ratio of an object's volume to its mass is

A)density
B)specific volume
C)specific gravity
D)specific weight

Answer 1

B

Question 2

Which of the following is the U.S.customary unit for mass?

A)kilograms
B)pound mass
C)grams
D)slugs

Answer 2

B

Question 3

Which of the following is the British Gravitation unit for mass?

A)kilograms
B)pound mass
C)grams
D)slugs

Answer 3

D

Question 4

The SI unit for specific weight is

A)
B)
C)
D)N/m3

Question 5

The SI unit for specific volume is

A)
B)
C)
D)

Question 6

What is the momentum of a object that slides at across an icy lake?

A)
B)
C)
D)None of the above

Question 7

Which of the following is the SI unit for mass?

A)kilograms
B)milligrams
C)grams
D)slugs

Question 8

The further away the mass is located from the center of rotation, the easier it will be to rotate the mass about that axis.

Question 9

The ratio of an object's mass to its volume is

A)density
B)specific volume
C)specific gravity
D)specific weight

Question 10

The ratio of an object's weight to its volume is

A)density
B)specific volume
C)specific gravity
D)specific weight

Question 11

A measure of how hard it is to rotate something with respect to its center of rotation is called

A)mass
B)momentum
C)torque
D)mass moment of inertia

Question 12

Specific weight is a fundamental dimension.

Question 13

The specific gravity is unitless

Question 14

Momentum is a fundamental dimension.

Question 15

The ratio of an object's density to the density of water is

A)density
B)specific volume
C)specific gravity
D)specific weight

Question 16

Density is a fundamental dimension.

Question 17

Matter can exist in four states, depending on its own and the surrounding conditions: solid, liquid, gaseous, or plasma.

Question 18

The SI unit for specific gravity is

A)
B)
C)
D)unitless

Question 19

The SI unit for density is

A)
B)
C)
D)

Question 20

Mass is a fundamental dimension.

Question 21

What does I stand for in the following equation (m is mass and r is distance):

A)mass moment of Inertia
B)Intensity
C)Inductance
D)Internal volume

Question 22

The SI unit for mass flow rate is

A)kg/s
B)slugs/s
C)lbm/s
D)none of the above

Question 23

The physical quantity of momentum is a vector quantity (has both magnitude and direction).

Question 24

A car is traveling at 108 km/h.What is its momentum?

Question 25

When a spinning ice skater pulls her arms inward, her angular velocity

A).increases
B)decreases
C)remains the same

Question 26

Which has more influence on a moving object's momentum?

A)the object's mass
B)the object's velocity
C)both mass and velocity
D)none of the above

Question 27

The SI unit for momentum is

A)
B)
C)
D)

Question 28

The Earth has a mass of and an average radius of .What is the average density of the Earth?

A)
B)
C)
D)

Question 29

What happens to the density of a marshmallow when squeeze it?

A)Increases
B)Decreases
C)Remains constant

Question 30

A truck and a motorcycle are moving with the same momentum.Which has the greater kinetic energy?

A)Truck
B)Motorcycle

Question 31

What happens to the volume of a marshmallow when squeeze it?

A)Increases
B)Decreases
C)Remains constant

Question 32

The amount of mass that flows through something per unit of time is called

A)mass moment of inertia
B)volumetric flow rate
C)mass flow rate
D)none of the above

Question 33

The farther away the mass is located from the center of rotation, the harder it is to rotate the mass about the given center of rotation.

Question 34

A rectangular block of aluminum has the following dimensions: .The density of aluminum is .How much does the block of aluminum weigh?

A)
B)
C)
D)

Question 35

What happens to the mass of a marshmallow when squeeze it?

A)Increases
B)Decreases
C)Remains constant

Question 36

Mass flow rate is a fundamental dimension.

Question 37

The closer the mass is located to the center of rotation, the harder it is to rotate the mass about the given center of rotation.

Question 38

A car has a momentum of .How fast is the car moving?

Question 39

The relationship between the mass flow rate and the volume flow rate is given by

A)mass flow rate is equal to (time)(volume flow rate)
B)mass flow rate is equal to (density)(volume flow rate)
C)mass flow rate is equal to (mass)(volume flow rate)
D)none of the above

Question 40

What does L stand for in the following equation (m is mass and v is velocity):

A)Length
B)Inertia
C)Momentum
D)Torque

Question 41

A roll of kitchen aluminum foil is 30 cm wide by 22 m long (if you unroll it).If the foil is 0.15 mm thick, and the specific weight of aluminum is , how much does the roll of aluminum foil weigh?

A)52.4 N
B)5.24 N
C)262 N
D)26.2 N

Question 42

It takes 5 seconds to fill a 500-ml bottle with water from your kitchen faucet.What is the mass flow rate from the faucet if water has a density of ?

A)1 kg/s
B)0.1 kg/s
C)0.01 kg/s
D)1 g/s

Question 43

Calculate the weight of all the air in a classroom with the dimensions of 9 m by 10 m by 3m.Assume the density of air to be approximately .Express your answers in both Newton and pound force.

Question 44

An aluminum alloy has a density of 2800 kg/m3.What is its specific weight?

A)27500 N/m3
B)2800 N/m3
C)27500 m3/kg
D)2800 m3/kg

Question 45

A car has a momentum of while traveling at .What is the car's mass?

Question 46

A block of unknown metal has dimensions: .The block's mass is .What is the density of the block?

A)
B)
C)
D)

Question 47

An aluminum cylinder is long and has a mass of , and if aluminum has a density of , what is the radius of the cylinder?

A)0.77 m
B)0.077 m
C)0.77 mm
D)7.7 mm

Question 48

While filling up your car with gasoline, you notice that it takes 3 minutes to dispense 50 liters of gasoline.What is the mass flow rate if water has a density of and gasoline has a specific gravity of 0.72?

A)2 kg/s
B)0.2 kg/s
C)20 kg/s
D)200 kg/s

Question 49

A roll of kitchen aluminum foil is 30 cm wide by 22 m long (if you unroll it).If the foil is 0.15 mm thick, and the density of aluminum is , what is the mass of the roll of aluminum foil?

A)267 kg
B)26.7 kg
C)2.67 kg
D)0.267 kg

Question 50

A block of unknown metal has dimensions: .The block's density is .What is the mass of the block?

A)
B)
C)
D)