An Introduction to Physical Science

McGraw-Hill

Chapter 15

Thermal Energy - all with Video Answers

Educators

Chapter Questions

Problem 1

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
internal combustion engine-heat engine

Bryan Lynn

Bryan Lynn

Numerade Educator

Problem 2

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
temperature- thermal energy

Victoria Jones

Numerade Educator

Problem 3

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
thermal energy - thermal pollution

Victoria Jones

Numerade Educator

Problem 4

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
conduction - convection

Devin Lea

Numerade Educator

Problem 5

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
conduction - thermal energy

Victoria Jones

Numerade Educator

Problem 6

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
thermal energy - specific heat

Victoria Jones

Numerade Educator

Problem 7

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
conduction - radiation

Devin Lea

Numerade Educator

Problem 8

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
convection-radiation

Devin Lea

Numerade Educator

Problem 9

Explain the differences in the vocabulary words given below. Then explain how the words are related. Use complete sentences in your answers.
conductor- thermal energy

Victoria Jones

Numerade Educator

Problem 10

What source of thermal energy does an internal combustion engine use?
A) steam
B) burning fuel
C) hot water
D) refrigerant

Hunza Gilgit

Numerade Educator

Problem 11

What happens to most materials when they become warmer?
A) They contract.
B) They vaporize.
C) They float.
D) They expand.

Dheeraj Sharma

Numerade Educator

Problem 12

Which occurs if two objects at different temperatures are in contact?
A) convection
B) condensation
C) radiation
D) conduction

Pronoy Sinha

Numerade Educator

Problem 13

Which of the following describes the thermal energy of particles in a substance?
A) average value of all kinetic energy
B) total value of all kinetic energy
C) total value of all kinetic and potential energy
D) average value of all kinetic and potential energy

Evey Z

Numerade Educator

Problem 14

Thermal energy moving from the Sun to Earth is an example of which process?
A) convection
B) radiation
C) expansion
D) conduction

Surjit Tewari

Numerade Educator

Problem 15

Many insulating materials contain spaces filled with air because air is what type of material?
A) conductor
B) radiator
C) coolant
D) insulator

Ajay Singhal

Numerade Educator

Problem 16

A recipe calls for a cake to be baked at a temperature of $350^{\circ} \mathrm{F}$. What is this temperature on the Celsius scale?
A) $162^{\circ} \mathrm{C}$
B) $194^{\circ} \mathrm{C}$
C) $177^{\circ} \mathrm{C}$
D) $212^{\circ} \mathrm{C}$

Ishita J.

Numerade Educator

Problem 17

Which of the following is true?
A) Warm air is less dense than cool air.
B) Warm air is as dense as cool air.
C) Warm air has no density.
D) Warm air is denser than cool air.

Amy Jiang

Numerade Educator

Problem 18

Which of these is the name for thermal energy that moves from a warmer object to a cooler one?
A) kinetic energy
B) heat
C) specific heat
D) temperature

Evey Z

Numerade Educator

Problem 19

Which of the following is an example of thermal energy transfer by conduction?
A) water moving in a pot of boiling water
B) warm air rising from hot pavement
C) the warmth you feel sitting near a fire
D) the warmth you feel holding a cup of hot cocoa

Ajay Singhal

Numerade Educator

Problem 20

When you heat water in a pan, the surface gets hot quickly, even though you are applying heat to the bottom of the water. Explain.

Pronoy Sinha

Numerade Educator

Problem 21

Explain why several layers of clothing often keep you warmer than a single layer.

James Stenhouse

James Stenhouse

Numerade Educator

Problem 22

The phrase "heat rises" is sometimes used to describe the movement of thermal energy. For what type of materials is this phrase correct? Explain.

Km Neeraj

Numerade Educator

Problem 23

Describe When a lightbulb is turned on, the electric current in the filament causes the filament to become hot and glow. If the filament is surrounded by a gas, describe how thermal energy is transferred from the filament to the air outside the bulb.

Salamat Ali

Numerade Educator

Problem 24

Some colors of clothing absorb radiation better than other colors. Design an experiment that will test various colors by placing them in the hot Sun for a period of time.

Jake Knight

Numerade Educator

Problem 25

Concrete sidewalks usually are made of slabs of concrete. Why do the concrete slabs have a space between them?

Shelby Mohamed

Numerade Educator

Problem 26

Copy and complete the following concept map on convection in a liquid.

Jonathan Everett

Jonathan Everett

Numerade Educator

Problem 27

A winter jacket is lined with insulating material that contains air spaces. How would the insulating properties of the jacket change if the insulating material in the jacket becomes wet? Explain.

Ajay Singhal

Numerade Educator

Problem 28

Compare Two glasses of water are poured into a pitcher. If the temperature of the water in both glasses was the same before and after they were mixed, describe how the thermal energy of the water in the pitcher compares to the water in the glasses.

David Zhang

Numerade Educator

Problem 29

In the United States, the Fahrenheit temperature scale is used most often. Some people feel that Americans should switch to the Celsius scale. Take a poll of at least 20 people. Find out if they feel the switch to the Celsius scale should be made. Make a list of reasons people give for or against changing.

Ronald Prasad

Numerade Educator

Problem 30

List the following temperatures from coldest to warmest: $80^{\circ} \mathrm{C}$ $200 \mathrm{K}, 50^{\circ} \mathrm{F}$

Gordon Ayadju

Numerade Educator

Problem 31

Change The high temperature on a summer day is $88^{\circ} \mathrm{F}$ and the low temperature is $61^{\circ} \mathrm{F}$. What is the difference between these two temperatures in degrees Celsius?

Teresa Fuston

Numerade Educator

Problem 32

The average global temperature is $286 \mathrm{K}$. Convert this temperature to degrees Celsius.

Nicole Smina

Numerade Educator

Problem 33

A doctor measures a patient's temperature at $38.4^{\circ} \mathrm{C}$. Convert this temperature to degrees Fahrenheit.

Ma Ednelyn Lim

Numerade Educator