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WorksheetsChapter 12: Heat conduction and thermal expansion
Total questions: 20
Worksheet time: 24mins
Hot coffee is stirred with a spoon, the spoon gets hot due to
Convection
Conduction
Radiation
If the area through which heat is transferred is increased by a factor of 2, then the rate of heat transfer is increased by .................
a factor of 4
a factor of 1/2
a factor of 2
a factor of 1
Units for thermal conductivity is .....
J kg-1 K-1
J mol-1 K-1
W mol-1 K-1
W m-1 K-1
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
A fireman feels a door and it is hot. Why does his hand feel hot?
Convection
Conduction
Radiation
When particles have reached the same temperature it is called____________.
equality
same
equilibrium
Heat transfers in three ways:
radiant, light, energy
conduction, radiation, convection
elastic, kinetic, potential
conduction, oven, microwave
Between two line, which has higher thermal conductivity?
Blue
Green
Both has the same thermal conductivity
none
What can we infer from the graph of temperature against length shown?
The metal bar is non - insulated
The metal bar is insulated
Not enough information given
The metal bar is made up of 2 different material
What can we infer from the graph of temperature against length shown?
The metal bar is non - insulated
The metal bar is insulated
Not enough information given
The metal bar is made up of 2 different material
