At what temperature do Celsius and Fahrenheit scale coincide?
-30o
-40o
40
70
Which is the following is a good source of heat radiation?
Black body
White body
Transparent body
Both 1 and 2
Solid can expands in how many ways ?
2
4
1
3
From the following which one is equivalent to 393 K ?
120o C
120o F
247o F
393o F
Railway tracks are made up of
Cobalt
Nickel
Chromium
Steel
The expansion of solids on heating and contraction on cooling is called
Thermal expansion
Normal expansion
Elastic expansion
elongation
In convection, heat is transferred
upwards
downwards
side ways
in all direction
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
What is the S.I. unit of heat ?
Newton
erg
joule
calorie
Which quantity determines the direction of flow of heat on keeping the two bodies in contact ?
Temperature
Heat
Internal energy
Kinetic energy
