Unit 1-1.7- Energy transfer

Question 1

What effect does the temperature difference between an object and its surrounds have?

Answer 1

The greater the temperature difference between an object and its surroundings the greater the rate at which energy is transferred.

Question 2

What 3 things also effect the rate at which energy is transferred?

Answer 2

The materials the object is in contact with.
The objects shape.
The object’s surface area.

Question 3

How can we maximize the rate of energy transferred to keep things cool?

Answer 3

Are good conductors.
Are painted dull black.
Have the airflow around them maximized.

Question 4

What things do we use to minimize the rate of energy transfer to keep things hot?

Answer 4

Are good insulators.
Are white and shiny.
Prevent convection currents by trapping air in small pockets.