Unit Test — Unit test Answers

25 verified answers
21
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Earl is using his hands to hold a metal pan 10 centimeters above a hot burner. How can this scenario be changed to demonstrate conduction between the pan and the burner?

A
increase the temperature of the burner
B
use a glass pan instead of a metal pan
C
use foam potholders to hold the pan
D
touch the pan to the burner
22
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Which substance is most likely to heat up the fastest?

A
water (specific heat of 4.19 J/g • C°)
B
copper (specific heat of 0.39 J/g • C°)
C
aluminum (specific heat of 0.90 J/g • C°)
D
dry air (specific heat of 1.01 J/g • C°)
24

Which is required for convection to occur?

A
a solid substance
B
a heat source
C
boiling water
D
air molecules
25

Barbara is converting 78°F to degrees Celsius. First, she subtracts 32 from 78. What is the next step?

A
multiply 46 by 5/9
B
multiply 46 by 9/5
C
add 273 to 46
D
subtract 273 from 46

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