why water cannot be used in barometer??
Answers
Answered by
4
If water is used in a barometer, it has following disadvantages :
1. The density of water is low, so nearly 10.4 m height of water column is needed to balance the normal atmospheric pressure. But it is highly inconvenient to take a tube of height 10.4 m for a barometer.
2. The vapour pressure of water is high, so it's vapours in the vacuum space will make the reading inaccurate.
3. Water sticks with the glass tube and wets it, so reading becomes inaccurate.
4. Water is transparent, so it's surface is not easily seen while taking the observation.
Hope it helps....
1. The density of water is low, so nearly 10.4 m height of water column is needed to balance the normal atmospheric pressure. But it is highly inconvenient to take a tube of height 10.4 m for a barometer.
2. The vapour pressure of water is high, so it's vapours in the vacuum space will make the reading inaccurate.
3. Water sticks with the glass tube and wets it, so reading becomes inaccurate.
4. Water is transparent, so it's surface is not easily seen while taking the observation.
Hope it helps....
Answered by
0
hii...friend
It can, but the barometer will be 33 ft (10m) tall.
There is also the issue of vapor pressure in the evacuated portion of the barometer, but this is a small technical issue that can be easily compensated for.
☺☺
It can, but the barometer will be 33 ft (10m) tall.
There is also the issue of vapor pressure in the evacuated portion of the barometer, but this is a small technical issue that can be easily compensated for.
☺☺
Similar questions