From the following which one is correct in the case of thermal expansion in solids ?
On heating the length of the wire decreases
On cooling the metallic bar contracts
On heating the diameter of the solid metallic bar contracts
On cooling the length of the wire increases
For making glassware we use Pyrex glass because,
of its high coefficient of cubical expansion
of its high coefficient of thermal expansion
of its very low coefficient of cubical expansion
of its very low coefficient of thermal expansion
The unit of coefficient of linear expansion is
m
moc-1
oc
oc-1
The cold air blowing from the sea towards the land during the day is called the
Ocean current
Land breeze
Sea breeze
None of these
Superficial expansion associate with
expansion in length
expansion in area
expansion in volume
expansion in mass
Which of the following process is faster?
Conduction
Convection
Radiation
Both 1 and 2
From the following quantity which one is measured using the principle of calorimetry ?
Temperature
work
force
Heat
What is the SI unit of heat?
erg
Joule
Kelvin
Celsius
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 very poor conductor of heat?
Water
Copper
Mercury
Iron
