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

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

A) Increases
B) Decreases
C) Remains constant

Answer 2

B

Question 3

Specific volume is a fundamental dimension.

Answer 3

False

Question 4

Which of the following is the SI unit for mass?

A) kilogram
B) milligram
C) gram
D) slug

Question 5

Specific gravity is a fundamental dimension.

Question 6

Which of the following statements best describes what mass is?

A) Mass is the amount of space something occupies.
B) Mass is resistance to acceleration.
C) Mass describes how heavy something is.
D) Mass describes how massive something is.

Question 7

Momentum is a fundamental dimension.

Question 8

Mass is a fundamental dimension.

Question 9

The SI unit for specific gravity is

Question 10

What is the momentum of a 2kg hockey puck that slides at across an icy lake?

Question 11

A rectangular block of aluminum has the following dimensions: $1^{\prime \prime} \times 1^{\prime \prime} \times 6 \text { ". }$
. The density of aluminum is $2700 { \mathrm { kg } } / \mathrm { m } ^ { 3 }$ . How much does the block of aluminum weigh?

A) 2.5N
B) 5N
C) 7.5N
D) 10N

Question 12

Specific weight is a fundamental dimension.

Question 13

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 14

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

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

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

The SI unit for specific weight is

Question 17

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

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

Question 18

The SI unit for specific volume is

Question 19

Density is a fundamental dimension.

Question 20

The SI unit for density is

Question 21

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

Question 22

The physical quantity of momentum has

A) magnitude only.
B) direction only.
C) both magnitude and direction.
D) neither magnitude nor direction.

Question 23

An aluminum cylinder is 5cm long and has a mass of 42g . If aluminum has a density of $2700 { \mathrm { kg } } / \mathrm { m } ^ { 3 }$ , how long is the cylinder?

A) 1cm
B) 2cm
C) 3cm
D) 4cm

Question 24

A block of unknown metal has the following dimensions: . The block's mass is 27g . What is the density of the block?

Question 25

A block of unknown metal has the following dimensions: $1 \mathrm {~cm} \times 1 \mathrm {~cm} \times 3 \mathrm {~cm}$ . The block's density is $8000 { \mathrm { kg } } / \mathrm { m } ^ { 3 }$ . What is the mass of the block?

A) 24g
B) 240g
C) 2.4kg
D) 24kg

Question 26

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

A) Increases
B) Decreases
C) Remains constant

Question 27

Which has the greater momentum: a motorcycle that weight 500 Newtons moving at a speed of 100 $\mathrm { m } / \mathrm { s }$ , or a bullet that weighs 5 millinewtons moving at a speed of $900 \mathrm {~m} / \mathrm { s } .$

A) Car
B) Bullet
C) Both the same

Question 28

Inertia is a fundamental dimension.

Question 29

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

A) Increases
B) Decreases
C) Remains constant

Question 30

While filling up your car with gasoline, you notice that it takes 2 minutes to dispense 15 gallons of gasoline. What is the mass flow rate if water has a density of 1000kgm3 and gasoline
Has a specific gravity of 0.72?

Question 31

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

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

Question 32

A roll of aluminum foil from the grocery store is 12 inches wide by 75 feet long (if you unroll it). If the foil is 0.006 inches thick, and the specific weight of aluminum is $26460 \mathrm {~N} / \mathrm { m } ^ { 3 }$ ,
How much does the roll of aluminum foil weigh?

A) 142884N
B) 4900N
C) 0.036N
D) 28N

Question 33

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

Question 34

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

A) Truck
B) Motorcycle

Question 35

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 36

It takes 20 seconds to fill a two-liter bottle with water from your kitchen faucet. What is the mass flow rate from the faucet if water has a density of ?

Question 37

The SI unit for momentum is

Question 38

What does L stand for in the following equation? $L = m v$

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

Question 39

What does I stand for in the following equation? $I = \int r ^ { 2 } d m$

A) Inertia
B) Intensity
C) Inductance
D) Internal volume

Question 40

Mass flow rate is a fundamental dimension.

Question 41

A roll of aluminum foil from the grocery store is 25 centimeters wide by 25 meters long (if you unroll it). If the roll of foil has a mass of 2.8kg and the density of aluminum is $2700 { \mathrm { kg } } / \mathrm { m } ^ { 3 }$ ,
What is the thickness of the aluminum foil?

A) 0.0003 cm
B) 0.0004 cm
C) 0.00017 cm
D) 0.0023 cm

Question 42

A roll of aluminum foil from the grocery store is 25 centimeters wide by 25 meters long (if you unroll it). If the foil is 0.1 millimeters thick, and the density of aluminum is $2700 { \mathrm { kg } } / \mathrm { m } ^ { 3 }$ , what
Is the mass of the roll of aluminum foil?

A) 15899 kg
B) 500 kg
C) 1.7 kg
D) .36 kg