A small amount of air is introduced into the vacuum above the mercury in a mercury barometer tube. The mercury level goes down because the air molecules
a
heat the mercury and make it expand
b
increase the pressure above the mercury.
c
cool the mercury and make it contract.
d
decrease the pressure above the mercury
Explanation
Correct Option
bNo explanation available
Video Explanation
No video available
Post your Contribution
Share:
Discussions (0)
No comments yet
Be the first to comment
