What is the SI unit of heat?
erg
Joule
Kelvin
Celsius
A brass 1m long, when heated through 50oC increases in length by 1.60 mm. Calculate the coefficient of linear expansion for brass.
0.00002/oC
3.2/oC
1.89/oC
0.1113/oC
Which of the following gas is not a green house gas?
CO2
Methane
CFC
Oxygen
At what temperature do Celsius and Fahrenheit scale coincide?
-30o
-40o
40
70
A good insulator of heat is
Cu
Mercury
Trapped air
Iron
What happens to the density of a substance when it is heated ?
decrease
increase
remain same
none of these
In vacuum heat is transferred only by the process of
conduction
convection
radiation
both 1 and 3
In convection, heat is transferred
upwards
downwards
side ways
in all direction
Which of the following one is correct ?
1o C = Fahrenheit degree
1o C = 32 K
Fahrenheit degree
If the change of temperature of a body is 20oC. Find the change of temperature of the body in Fahrenheit scale.
35oF
36oF
40oF
50oF
