Thermal Energy Review

Question 1

What is the sp ht of a 0.3kg piece of metal that absorbs 9000J as the temp raises 10 degrees C?

Accepted Answer

3000J/kgxC

Question 2

All heating systems for homes require

Accepted Answer

energy

Question 3

Find the change in energy of a 20kg chair heated from 15-30°C if the sp ht is 700J/(kg°C)

Accepted Answer

210,000 J

Question 4

A(n) ___________ does not conduct heat or energy well.

Accepted Answer

insulator

Question 5

_______ is a measure of the average kinetic energy or particles that make up an object

Accepted Answer

temperature

Question 6

Heat engines convert _________ energy into ___________ energy.

Accepted Answer

thermal, mechanical

Question 7

________ is the thermal energy that is transferred from a material with a high temp to low temp

Accepted Answer

Heat

Question 8

If the particles that make up an object begin to move quickly, their KE _______, and temp _____

Accepted Answer

increases, rises

Question 9

a change in energy in a system is equal to the thermal energy plus the work done by the system

Accepted Answer

First law of thermodynamics

Question 10

The moving particles that make up an object have ________ energy

Accepted Answer

kinetic

Question 11

Which heating systems use fuel to heat a mass of surrounding air that is blown through ducts?

Accepted Answer

forced air

Question 12

Which of the following particles, in general, will have the highest kinetic energy?

Accepted Answer

gas

Question 13

Thermal energy is the ___________ in a system

Accepted Answer

total energy

Question 14

A ________ transforms radiant energy from the sun into thermal energy.

Accepted Answer

solar conductor

Question 15

Why is water often used as a coolant?

Accepted Answer

it has a high specific heat

Question 16

_______________ is the transfer of energy based on density differences: warmer substances rise

Accepted Answer

convection

Question 17

Which is the most effective thermal conductor?

Accepted Answer

solid

Question 18

_____________ is the transfer of energy from electromagnetic waves

Accepted Answer

radiation

Question 19

The transfer of energy through particles by direct contact is

Accepted Answer

conduction

Question 20

Heat engine that burns fuel inside the engine in chambers or cylinders

Accepted Answer

internal combustion engine

Question 21

study of the relationship between thermal energy, heat, and work

Accepted Answer

thermodynamics

Question 22

Any material that flows is a:

Accepted Answer

fluid

Question 23

Amount of thermal energy needed to raise 1 gram of a substance 1 degree celsius

Accepted Answer

specific heat

Question 24

Which would you expect to find in a home with passive solar heating?

Accepted Answer

wall of large windows

Question 25

States that thermal energy will only flow from hotter to cooler particles

Accepted Answer

Second law of thermodynamics

Thermal Energy Review

Questions 25

Thermal Energy Review

Questions 25