What happens to the density of a substance when it is heated ?
decrease
increase
remain same
none of these
In convection, heat is transferred
upwards
downwards
side ways
in all direction
Temperature of the human body is 98.4oF. The corresponding temperature on Celsius scale
38.3
36.9
40
50
Which of the following is a good conductor of heat?
Copper
Paper
Wood
Cloth
Which of the graph shows the anomalous expansion of water ?
The hot and cold region on the earth surface give rise to the large convection currents in the sea which are called as
Land breeze
Ocean currents
Sea breeze
None of these
Which of the following process is faster?
Conduction
Convection
Radiation
Both 1 and 2
Heat radiations travel with a speed
less than the speed of light
equal to speed of light
greater than speed of light
equal to speed of sound
The process of transfer of heat from a hot end to the cold end from particle to particle of the medium is
convection
radiation
conduction
both 1 and 3
From the following quantity which one is measured using the principle of calorimetry ?
Temperature
work
force
Heat
