Simple barometer was first designed by :

1. Sir Issac Newton
2. Pascal
3. Torricelli
4. Thomas Alva Edison

A barometer is used :

1. to measure atmospheric pressure
2. for weather forecasting
3. as an altimeter to measure heights
4. all of the above

At high altitudes, the atmospheric pressure is :

1. less
2. high
3. high due to strong winds
4. low due to the cloud floating above.

Mercury is preferred as a barometric liquid because :

1. its density is high
2. its vapour pressure is negligible
3. it neither wets nor sticks to the glass
4. all of the above