Heat Transfer P1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Where on an object i heat radiation emitted from? | The surface
🗑
|
||||
| Why does surface area increase radiation? | Because more infrared waves can be emitted from the surface and so heat transfer is quicker
🗑
|
||||
| Give two uses of increasing surface area to increase radiation. | • Radiators have large surface areas to maximise heat transfer
• Car have large fins so heat radiates and engine cools quicker
🗑
|
||||
| What happens if two objects, one with a large volume and the other with a small volume, at the same temperature radiate? | The object with the smaller volume will radiate heat and cool quicker because a higher proportion of its surface is in contact with its surroundings
🗑
|
||||
| How can the type of material affect rate of heat transfer? | An object in contact with a good conductor will radiate more heat than an object in contact with a good insulator
🗑
|
||||
| In a vacuum flask, which features stop: a) Conduction (3) b) Convection (1) c) Radiation (1)? | a) Double walled with vacuum, insulating foam and plastic stopper filled with cork
b) Double walled with vacuum
c) Silver wall
🗑
|
||||
| Why do arctic foxes have small ears? | To minimise heat loss by radiation due to surface area
🗑
|
||||
| Why do desert foxes have huge ears? | To allow them to lose heat due to large surface area to keep cool
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Normal Size Small Size show me how
Created by:
GuyBrazier
Popular Physics sets