Chapter 6: Thermal Energy

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SI units

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28 Terms

1

SI units

In ________, temperature is measured in kelvins (K)

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2

coolant

A(n) ________ is a substance that is used to absorb heat.

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3

convection

When ________ occurs, more energetic particles move from one place to another.

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4

radiator

A(n) ________ is a closed metal container that contains hot water or steam.

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5

Thermodynamics

________: Study of the relationship among thermal, energy, and heat.

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6

passive solar

In a(n) ________ heating system, radiant energy from the Sun is transferred to the room through windows.

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7

Temperature

________: a measure of the average kinetic energy of the particles in the object.

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8

source of energy

All heating systems require some ________.

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9

constant motion

Conduction occurs because particles in matter are in ________.

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10

Insulator

________: A material in which heat flows slowly.

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11

Convection currents

________ transfer heat from warmer to cooler parts of the fluid.

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12

thermal energy

If the temperature doesnt change, the ________ in an object increases if the mass of the object increases.

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13

heat pump

A(n) ________ is a two- way heat mover.

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14

Radiation

________: the transfer of energy by electromagnetic waves.

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15

Convection

________: the transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from place to place.

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16

thermal energy

In fluids, ________ can be transferred by convection.

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17

Thermal Energy

The sum of the kinetic and potential energy of all the particles in an object

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18

Heat

thermal energy that flows from something at a higher temperature to something at a lower temperature

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19

Specific Heat

he amount of heat that is needed to raise the temperature of 1 kg of some material by 1°C

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20

Conduction

the transfer of thermal energy by collisions between particles in matter

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21

Convection

the transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from place to place

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22

Radiation

the transfer of energy by electromagnetic waves

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23

Solar Collectors

absorbs radiant energy from the Sun

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24

Thermodynamics

Study of the relationship among thermal, energy, and heat

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25

First Law of Thermodynamics

the increase in thermal energy of a system equals the work done on the system plus the heat transferred to the system

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26

Second Law of Thermodynamics

It is impossible for heat to flow from a cool object to a warmer object unless work is done

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27

Heat Engine

A device that converts heat into work

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28

Internal Combustion Engine

The heat engine in a car

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