1
Q
2 properties of electromagnetic waves
A
Same speed in a vacuum
Longitudal
2
Q
Why do black surfaces become hot quickly
A
They are good absorbers of ir radiation
3
Q
Oven gloves are
A
Good conductors
4
Q
Two factors that determine the amount of energy transferred from an oven
A
Power
Time
5
Q
Causing a
A
Convection
6
Q
What instrument is used to measure mass
A
Balance
7
Q
Energy can be transferred usefully but cannot be
A
Created or destroyed
8
Q
A power station in a hot desert is a good idea because of the
A
High levels of infared
9
Q
Power station are good to generate electricity because they are
A
Free
10
Q
A u value is
A
How effective a material is at insulating
11
Q
Why is the extract not valid
A
Some days heating is on more or less
Physics
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