Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Rate of Heat Transfe

QuestionAnswer
where is heat energy from an object radiated from? the surface
The bigger the surface area... the more infrared waves that can be emitted or absorbed by the surface
why do car engines have 'fins'? they increase the surface area so heat is radiated away quicker, so the engine cools quicker
what type of materials transfer heat away more quickly? objects made from good conductors
why is a vacuum flask double walled with a vacuum between the 2 walls? to stop all conduction and convection through the sides
why are the walls either side of a vacuum silvered? to keep heat loss by radiation to a minimum
why is the bottle supported using insulating foam? it minimises heat conduction to or from the outer glass bottle
why is the stopper made of plastic and filled with cork or foam? to reduce any heat conduction through it
why do the hairs on your skin 'stand up'? to trap a layer of insulating air, this limits the amount of heat loss by convection
why do some people go pink when they get hot? because your body diverts more blood to flow near the surface of your skin so that more heat can be lost by radiation
Created by: rv1