Question

Please help make sure my answers are right.
Will Fan and Medal

Answer 1

1. Which is the correct equation, Q=MxCxDeltaT rearranged to solve for specific heat?
1.) C=(MxDeltaT)/Q
2.) C=Q-(MxDeltaT)
3.) C=Q/(M+DeltaT)
4.) C=Q/(MxDeltaT)<-MyAnswer

2. Which is a consequence of the third law of thermodynamics?

1.) Engines cannot discharge waste heat.
2.) Heat engines are less than 100 percent efficient. <-My Answer
3.) Energy is not always conserved.
4.) Engines produce more waste heat than work.

3. Hot air rises due to its difference in _____.

1.) density<-MyAnswer
2.) composition
3.) mass
4.) weight

4. Which is the transfer of energy as waves moving through space?

1.) insulation
2.) convection
3.) conduction
4.) radiation<-MyAnswer

5. All objects _____ energy.

1.) eliminate
2.) insulate
3.) radiate<-MyAnswer
4.) conduct
6. What is the purpose of the coils under a refrigerator?

1.) They release extra refrigerant that may have built up over time.
2.) They release thermal energy generated by the motor to keep the refrigerator cold.<-MyAnswer
3.) They keep the inside of the refrigerator cool.

7. Which is the average kinetic energy of particles in an object?

1.) work
2.) energy conservation<-MyAnswer
3.) potential energy
4.) temperature

8. What increases as the temperature of a solid object rises?

1.) potential energy<-MyAnswer
2.) mass
3.) thermal energy
4.) volume

9. Where is the coolest air found inside an oven?

1.) in the middle
2.) at the bottom<-MyAnswer
3.) at the top

10. Which central heating system involves a furnace and a blower?

1.) electric baseboard
2.) steam
3.) hot water
4.) forced air<-MyAnswer

11. What is true about energy that is added to a closed system?

1.) It does work or increases thermal energy.<-MyAnswer
2.) It cannot heat the environment.
3.) It is converted to radiation.

12. What term describes thermal energy that is not converted into work by a heat engine?

1.) transferred heat
2.) waste heat<-MyAnswer
3.) radiation

13. The thermal energy in a cup of tea is _____ the thermal energy in a pot of tea at the same temperature.

1.) greater than<-MyAnswer
2.) equal to
3.) less than

14. Thermodynamics is the study of the _____ of heat and other forms of energy.

1.) conversion
2.) change<-MyAnswer
3.) transfer
4.) interaction

15. What is the specific heat of water?

1.) 4.18 J/g°C
2.) 1.00 J/g°C
3.) 9.18 J/g°C<-My Answer
4.) 8.36 J/g°C

16. Which describes the way a convection current moves?

1.) in a loop<-My Answer
2.) in a spiral
3.) in a line

17. When thermal energy is added to a system, what happens to the overall energy in that system?

1.) It is decreased by the amount added.
2.) It is increased by the amount added.<-My Answer
3.) The overall energy stays the same.

18. Which is not an advantage of a radiant heating?

1.) It can easily be turned off.
2.) It can replace central heating systems.
3.) It can direct warm air where it is needed.<-My Answer

19. Which type of heating system is often used to heat many buildings from a central location?

1.) electric
2.) steam<-My Answer
3.) hot-water

20. What is commonly used to run a central heating system?

1.) nuclear energy
2.) geothermal energy<-My Answer
3.) solar energy
4.) electrical energy

Answer 2

I put my answers tell me if i am right please!!

Answer 3

Is this a test?

Answer 4

no study guide

Answer 5

need to study this for a test in a week

Answer 6

Okay let me tell my friend to help you.

Answer 7

@Wendy.Ivette11714

Answer 8

I can't help you with the questions about advantages of the different installations, but I noticed some wrong answers.

13) the thermal energy is greater in the pot: more molecules at the same temperature implies greater thermal energy
15) the specific heat of water is 4.18 J/g*ºC (4,18 J = 1 calorie, which is the heat needed to warm 1ºC one gram of water.

Answer 9

These are so many questions.

Answer 10

you think you can help? @KendrickLamar2014

Answer 11

@Wendy.Ivette11714

Answer 12

@pig_cat223