Physics
A gas thermometer is more sensitive than a liquid thermometer because a gas :

Expands more than a liquid
Is lighter than liquid
Does not change state easily
Is easy to obtain

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Physics
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

The initial momentum of the rubber ball is greater than that of the metal ball
The metal ball suffers greater change in momentum
The rubber ball suffers greater change in momentum
Both suffer the same change in momentum

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