Which one of the following about different frictional forces is correct?
Kinetic friction > Static friction > Rolling friction
Static friction > Rolling friction > Kinetic friction
Static friction > Kinetic friction > Rolling friction
Static friction > Kinetic friction = Rolling friction
A metallic bob X of mass m is released from position A. It collides elastically with another identical bob Y placed at rest at position B on a horizontal frictionless table. The angle AOB is 30°.
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How high does the bob X rise immediately after the collision?
To the same height as that of position A on the other side in the same trajectory
To half the height as that of position A on the other side along the same trajectory
The same height at position A
It stops at position B
Consider the two statements given below:
Statement-1 : Infrared waves are also called heat waves.
Statement-2 : Water molecules readily absorb infrared waves.
Select the correct answer using the code given below :
Both the statements are individually true and Statement-2 is the correct explanation of Statement-1.
Both the statements are individually true, but Statement-2 is not the correct explanation of Statement-1.
Statement-1 is true, but Statement-2 is false.
Statement-2 is true, but Statement-1 is false.
Water gas is a mixture of:
CO₂ and H₂
CO and H₂
CO₂ and H₂O
CO and H₂O