Question 1

Oxygen condenses into a liquid at approximately 90 K.What temperature,in degrees Fahrenheit,does this correspond to?

Accepted Answer

A) -193°F 
B) -217°F 
C) -265°F 
D) -297°F 
A) -193°F 
B) -217°F 
C) -265°F 
D) -297°F

Question 2

The temperature changes from 35°F during the night to 75°F during the day.What is the temperature change on the Celsius scale?

Accepted Answer

A) 72 C° 
B) 40 C° 
C) 32 C° 
D) 22 C° 
A) 72 C° 
B) 40 C° 
C) 32 C° 
D) 22 C°

Question 3

A styrofoam sphere of radius R has a density ρ.You now carefully compress the sphere so its radius is R/2.What is the density of the compressed sphere?

Accepted Answer

A) 2 ρ 
B) 4 ρ 
C) ρ $\sqrt { 8 }$ 
D) ρ $\sqrt { 2 }$ 
E) 8 ρ 
A) 2 ρ 
B) 4 ρ 
C) ρ $\sqrt { 8 }$ 
D) ρ $\sqrt { 2 }$ 
E) 8 ρ

Question 4

The weather outside is frightful.The temperature is -22°F.What is the corresponding temperature in the Celsius scale?

Accepted Answer

A) -35°C 
B) -30°C 
C) -22°C 
D) -20°C 
E) -12°C 
A) -35°C 
B) -30°C 
C) -22°C 
D) -20°C 
E) -12°C

Question 5

What is the average translational kinetic energy of an ideal gas at $819 \mathrm {~K} \text { ? }$ The Boltzmann constant is 1.38 × 10-23 J/K.

Accepted Answer

A) 1.70 x 10-20 J 
B) 5.65 x 10-21 J 
C) 1.13 x 10-17 J 
D) 3.77 x 10-19 J 
A) 1.70 x 10-20 J 
B) 5.65 x 10-21 J 
C) 1.13 x 10-17 J 
D) 3.77 x 10-19 J

Question 6

What is absolute zero on the (a)Celsius scale and (b)on the Fahrenheit scale?

Accepted Answer

(a)-273°C

Question 7

What is the total translational kinetic energy of the gas in a classroom filled with nitrogen at $1.01 \times 10 ^ { 5 } \mathrm {~Pa}$ at $20.7 ^ { \circ } \mathrm { C } \text { ? }$ The dimensions of the classroom are $4.60 \mathrm {~m} \times 5.20 \mathrm {~m} \times 8.80 \mathrm {~m} .$ The Boltzmann constant is 1.3806503 × 10-23 J/K,R = 8.31 J/mol ∙ K,and NA = 6.022 × 1023 molecules/mol.

Accepted Answer

Question 8

A sealed container holds 0.020 moles of ideal nitrogen (N2)gas,at a pressure of 1.5 atm and a temperature of 290 K.The atomic mass of nitrogen is 14.0 g/mol.How many molecules of nitrogen are in the container? (R = 8.31 J/mol ∙ K,1 atm = 101 kPa)

Accepted Answer

A) 1.5 × 1021 mol 
B) 3.0 × 1021 mol 
C) 6.0 × 1021 mol 
D) 1.2 × 1022 mol 
E) 2.4 × 1022 mol 
A) 1.5 × 1021 mol 
B) 3.0 × 1021 mol 
C) 6.0 × 1021 mol 
D) 1.2 × 1022 mol 
E) 2.4 × 1022 mol

Question 9

A compressed gas with a total mass of $107 \mathrm {~kg}$ is stored in a spherical container having a radius of 0.521 m.What is the density of the compressed gas?

Accepted Answer

A) 181 kg/m3 
B) 110 kg/m3 
C) 134 kg/m3 
D) 161 kg/m3 
A) 181 kg/m3 
B) 110 kg/m3 
C) 134 kg/m3 
D) 161 kg/m3

Question 10

How many grams of ethanol (density 0.80 g/cm3)should be added to 5.0 g of chloroform (density 1.5 g/cm3)if the resulting mixture is to have a density of 1.2 g/cm3? Assume that the fluids do not change their volumes when they are mixed.

Accepted Answer

A) 2.0 g 
B) 2.4 g 
C) 1.8 g 
D) 4.4 g 
E) 1.6 g 
A) 2.0 g 
B) 2.4 g 
C) 1.8 g 
D) 4.4 g 
E) 1.6 g

Question 11

One of the dangers of tornados and hurricanes is the rapid drop in air pressure that is associated with such storms.Assume that the air pressure inside of a sealed house is 1.02 atm when a hurricane hits.The hurricane rapidly decreases the external air pressure to 0.910 atm.What net outward force is exerted on a square window of the house that is $2.03 \mathrm {~m}$ on each side? (1.00 atm = 1.01 × 105 Pa)

Accepted Answer

A) 4.59 × 104 N 
B) 5.19 × 104 N 
C) 4.82 × 105 N 
D) 5.42 × 105 N 
A) 4.59 × 104 N 
B) 5.19 × 104 N 
C) 4.82 × 105 N 
D) 5.42 × 105 N

Question 12

A gas-filled vertical cylinder,closed at the bottom end,is fitted at the top with a piston that can move freely.The mass of the piston is 10.0 kg,and the initial height of the piston above the bottom of the cylinder is 25 cm.A mass of 8.0 kg is placed on the piston.What is the resulting height of the piston,assuming that the temperature of the ideal gas is kept constant?

Accepted Answer

A) 12 cm 
B) 13 cm 
C) 14 cm 
D) 15 cm 
E) 16 cm 
A) 12 cm 
B) 13 cm 
C) 14 cm 
D) 15 cm 
E) 16 cm

Question 13

The density of material at the center of a neutron star is approximately 1.00 × 1018 kg/m3.What is the mass of a cube of this material that is $1.76 \mathrm { microns }$ on each side.(One micron is equal to 1.00 × 10-6 m.)

Accepted Answer

A) 5.45 kg 
B) 4.74 kg 
C) 6.16 kg 
D) 6.70 kg 
A) 5.45 kg 
B) 4.74 kg 
C) 6.16 kg 
D) 6.70 kg

Question 14

If the temperature of a gas is increased from 20°C to 100°C,by what factor does the rms speed of an ideal molecule change?

Accepted Answer

A) 1.1 
B) 1.3 
C) 2.2 
D) 1.6 
A) 1.1 
B) 1.3 
C) 2.2 
D) 1.6

Question 15

When a heavy metal block is supported by a cylindrical vertical post of radius R,it exerts a force F on the post.If the diameter of the post is increased to 2R,what force does the block now exert on the post?

Accepted Answer

A) F/4 
B) F/2 
C) F/ $\sqrt { 2 }$ 
D) F 
E) 2F 
A) F/4 
B) F/2 
C) F/ $\sqrt { 2 }$ 
D) F 
E) 2F

Question 16

Platinum melts at 3215°F.What is the corresponding temperature in the Kelvin scale?

Accepted Answer

A) 2041 K 
B) 2135 K 
C) 2207 K 
D) 2296 K 
E) 3215 K 
A) 2041 K 
B) 2135 K 
C) 2207 K 
D) 2296 K 
E) 3215 K

Question 17

The absolute temperature of an ideal gas is directly proportional to which of the following quantities?

Accepted Answer

A) the average speed of its molecules 
B) the average momentum of its molecules 
C) the average kinetic energy of its molecules 
D) the mass of its molecules 
E) It is proportional to all of the above quantities. 
A) the average speed of its molecules 
B) the average momentum of its molecules 
C) the average kinetic energy of its molecules 
D) the mass of its molecules 
E) It is proportional to all of the above quantities.

Question 18

A 0.50 $m ^ { 3 }$ gas tank holds 3.0 moles of ideal diatomic nitrogen gas at a temperature of $350 \mathrm {~K} .$ The atomic mass of nitrogen is $14.0 \mathrm {~g} / \mathrm { mol }$ What is the rms speed of the molecules? (The Boltzmann constant is 1.38 × 10-23 J/K,NA = 6.022 × 1023 molecules/mol.)

Accepted Answer

A) 560 
B) 790 
C) 390 
D) 21 
E) 97 
A) 560 
B) 790 
C) 390 
D) 21 
E) 97

Question 19

Substance A has a density of 3 g/cm3 and substance B has a density of 4 g/cm3.In order to obtain equal masses of these two substances,what must be the ratio of the volume of A to the volume of B?

Accepted Answer

A)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\frac { 1 } { 3 }$ 
B)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\frac { 4 } { 3 }$ 
C)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\frac { 3 } { 4 }$ 
D)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\sqrt { \frac { 3 } { 4 } }$ 
E)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\frac { 3 } { 1 }$ 
A)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\frac { 1 } { 3 }$ 
B)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\frac { 4 } { 3 }$ 
C)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\frac { 3 } { 4 }$ 
D)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\sqrt { \frac { 3 } { 4 } }$ 
E)  $\frac { V _ { \mathrm { A } } } { V _ { \mathrm { B } } }$ = $\frac { 3 } { 1 }$

Question 20

A fixed container holds oxygen and helium gases at the same temperature.Which of the following statements are correct? (There could be more than one correct choice.)

Accepted Answer

A) The oxygen molecules have the greater average kinetic energy. 
B) The helium molecules have the greater average kinetic energy. 
C) The oxygen molecules have the greater speed. 
D) The helium molecules have the greater speed. 
E) The helium molecules have the same average kinetic as the oxygen molecules. 
A) The oxygen molecules have the greater average kinetic energy. 
B) The helium molecules have the greater average kinetic energy. 
C) The oxygen molecules have the greater speed. 
D) The helium molecules have the greater speed. 
E) The helium molecules have the same average kinetic as the oxygen molecules.

Exam 10: Gases

Oxygen condenses into a liquid at approximately 90 K.What temperature,in degrees Fahrenheit,does this correspond to?

The temperature changes from 35°F during the night to 75°F during the day.What is the temperature change on the Celsius scale?

A styrofoam sphere of radius R has a density ρ.You now carefully compress the sphere so its radius is R/2.What is the density of the compressed sphere?

The weather outside is frightful.The temperature is -22°F.What is the corresponding temperature in the Celsius scale?

What is the average translational kinetic energy of an ideal gas at 819 K ? 819 \mathrm {~K} \text { ? }819 K ? The Boltzmann constant is 1.38 × 10-23 J/K.

What is absolute zero on the (a)Celsius scale and (b)on the Fahrenheit scale?

A sealed container holds 0.020 moles of ideal nitrogen (N2)gas,at a pressure of 1.5 atm and a temperature of 290 K.The atomic mass of nitrogen is 14.0 g/mol.How many molecules of nitrogen are in the container? (R = 8.31 J/mol ∙ K,1 atm = 101 kPa)

A compressed gas with a total mass of 107 kg107 \mathrm {~kg}107 kg is stored in a spherical container having a radius of 0.521 m.What is the density of the compressed gas?

How many grams of ethanol (density 0.80 g/cm3)should be added to 5.0 g of chloroform (density 1.5 g/cm3)if the resulting mixture is to have a density of 1.2 g/cm3? Assume that the fluids do not change their volumes when they are mixed.

The density of material at the center of a neutron star is approximately 1.00 × 1018 kg/m3.What is the mass of a cube of this material that is 1.76microns1.76 \mathrm { microns }1.76microns on each side.(One micron is equal to 1.00 × 10-6 m.)

If the temperature of a gas is increased from 20°C to 100°C,by what factor does the rms speed of an ideal molecule change?

When a heavy metal block is supported by a cylindrical vertical post of radius R,it exerts a force F on the post.If the diameter of the post is increased to 2R,what force does the block now exert on the post?

Platinum melts at 3215°F.What is the corresponding temperature in the Kelvin scale?

The absolute temperature of an ideal gas is directly proportional to which of the following quantities?

Substance A has a density of 3 g/cm3 and substance B has a density of 4 g/cm3.In order to obtain equal masses of these two substances,what must be the ratio of the volume of A to the volume of B?

A fixed container holds oxygen and helium gases at the same temperature.Which of the following statements are correct? (There could be more than one correct choice.)

Introduction

Kinematics: Motion in One Dimension

Newtonian Mechanics

Applying Newtons Laws

Circular Motion

Impulse and Linear Momentum

Work and Energy

Extended Bodies at Rest

Rotational Motion

Static Fluids

Fluids in Motion

First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge force and Energy

The Electric Field

Dc Circuits

Magnetism

Electromagnetic Induction

Vibrational Motion

Mechanical Waves

Reflection and Refraction

Mirrors and Lenses

Wave Optics

Electromagnetic Waves

Special Relativity

Quantum Optics

Atomic Physics

Nuclear Physics

Particle Physics

Filters

What is the average translational kinetic energy of an ideal gas at $819 \mathrm {~K} \text { ? }$ The Boltzmann constant is 1.38 × 10^-23 J/K.

A sealed container holds 0.020 moles of ideal nitrogen (N₂)gas,at a pressure of 1.5 atm and a temperature of 290 K.The atomic mass of nitrogen is 14.0 g/mol.How many molecules of nitrogen are in the container? (R = 8.31 J/mol ∙ K,1 atm = 101 kPa)

A compressed gas with a total mass of $107 \mathrm {~kg}$ is stored in a spherical container having a radius of 0.521 m.What is the density of the compressed gas?

How many grams of ethanol (density 0.80 g/cm³)should be added to 5.0 g of chloroform (density 1.5 g/cm³)if the resulting mixture is to have a density of 1.2 g/cm³? Assume that the fluids do not change their volumes when they are mixed.

The density of material at the center of a neutron star is approximately 1.00 × 10¹⁸ kg/m³.What is the mass of a cube of this material that is $1.76 \mathrm { microns }$ on each side.(One micron is equal to 1.00 × 10^-6 m.)

Substance A has a density of 3 g/cm³ and substance B has a density of 4 g/cm³.In order to obtain equal masses of these two substances,what must be the ratio of the volume of A to the volume of B?