Physics- Chapter 8

Question 1

What property of an object is related to the average kinetic energy of the particles in that object?

Answer 1

temperature

Question 2

• through liquid
• the process in which heat is carried from one place to another by bulk movement of a fluid
• ex: tectonic plates; weather; ocean currents; lava lamp
• energy carried by material; contact is not needed

Answer 2

convection

Question 3

• through material; no transfer of matter (only energy)
• the process whereby heat is transferred directly through a material, with any bulk motion of the material playing no role in the transfer
• ex: soldering, welding, grilling

Answer 3

conduction

Question 4

• transfer of energy as waves moves from space

- the process in which energy is transferred by means of electromagnetic waves

Answer 4

radiation

Question 5

• 334 J/g

- the amount of heat needed to melt a unit of mass at its melting point

Answer 5

heat of fusion

Question 6

• 2260 J/g

- the amount of heat needed to vaporize a unit of mass at its melting point

Answer 6

heat of vaporization

Question 7

thermal expansion of gases and liquids

Answer 7

gases- lower

liquids- rise

Question 8

3 factors that will affect thermal energy

Answer 8

1) Mass
2) Phase
3) Actual temperature

Question 9

What does the Q stand for in Q=mcT

Answer 9

thermal energy

Question 10

What does the m stand for in Q=mcT

Answer 10

mass

Question 11

What does the c stand for in Q=mcT

Answer 11

specific heat

Question 12

What does the T stand for in Q=mcT

Answer 12

change in temperature

Question 13

the only thing a calorimeter directly tells us is…

Answer 13

temperature

Question 14

1) the best place to put warm air vents is…

2) the best place to put cold air vents is…

Answer 14

Both should be on the bottom (floor) but not in the same place

Question 15

What are the phases of matter?

Answer 15

1) Solid
2) Liquid
3) Gas
4) Plasma

Question 16

Fahrenheit to Celsius

Answer 16

C= 5/9 (F-32)

Question 17

Celsius to Farenheit

Answer 17

F= 9/5 C + 32

Question 18

Celsius to Fahrenheit

Answer 18

F= 9/5 C + 32

Question 19

Kelvin

Answer 19

C + 273 = K

K - 273 = C

Question 20

total sum of all kinetic and potential energy associated with the random motion and arrangement of a material

Answer 20

thermal energy

Question 21

the measure of hotness or coldness; determines the flow of heat; average

Answer 21

temperature

Question 22

the transfer of thermal energy

Answer 22

heat

Question 23

conduct heat well

ex: metals

Answer 23

thermal conductors

Question 24

conduct heat poorly

ex: non-metals, gas (space), vacuums

Answer 24

thermal insulators

Question 25

materials with dead air spaces are usually excellent thermal insulators

Answer 25

insulation

Question 26

which of the following devices is based on thermal expansion?

Answer 26

thermometer

Question 27

Thermal energy depends on an object’s what?

a) Mass
b) Temperature
c) Phase (solid, liquid, gas)
d) All of the Above

Answer 27

all of the above

Question 28

Energy from the sun mostly reaches the Earth by…

Answer 28

radiation

Question 29

the transfer of thermal energy as waves moving through space is called _________

Answer 29

radiation

Question 30

the type of thermal energy transfer that takes place in fluids is mostly __________

Answer 30

convection

Question 31

a material that conducts thermal energy well is called a thermal __________

Answer 31

conductor

Question 32

a measure of how hot or cold an object is compared to a reference point can be measured in units of ____________ or ____________

Answer 32

degrees Celsius or Kelvin

Question 33

a hot dinner plate has ____________ thermal energy than a similar dinner plate at room temperature

Answer 33

greater

Question 34

in a calorimeter, the increase in the thermal energy of the water and the decrease in the thermal energy of the sample are _________

Answer 34

equal