WorksheetsThermal Expansion Bridge
Total questions: 15
Worksheet time: 27mins
What is Thermal expansion?
The transfer of thermal energy between materials by the collisions of particles
Is a decrease in a materials size when temperature decreases
An increase in a materials size when temperature increases
Chicken fried rice
Coefficient of linear expansion, Coefficient of area expansion and Coefficient of volume expansion have the unit of....
oC-1
oC
W m-1 oC-1
J m-1 oC-1
Thermal expansion of liquid depends on the expansion of the container that it fills. However, why does liquid overflow after heating?
because container does not expand
because coefficient of volume expansion for liquid is bigger than the container
because liquid and container expand at the same amount
because particles in solid container is more closely packed together than liquid
The length of copper wire at 20oC is 4.5m. Calculate its new length when the temperature is 95oC. Given α = 1.7×10-5 oC-1
4.55m
5.41m
5.11m
4.51m
The picture shows a bimetallic strip in a fire alarm. When there is a fire outbreak, the bimetallic strip will get hot, ....
bend downwards, complete the circuit and the alarm rings.
bend upwards, open the circuit and the alarm will not ring.
becomes longer, open the circuit and the alarm will not ring.
Take the coefficient of expansion to be 25 x 10-6
α = 25 x 10-6
