The normal atmospheric pressure is :

1. 76 m of Hg
2. 76 cm of Hg
3. 76 Pa
4. 76 N m^-2

The unit torr is related to the barometric height as:

1. 1 torr = 1 cm of Hg
2. 1 torr = 0.76 cm of Hg
3. 1 torr = 1 mm of Hg
4. 1 torr = 1 m of Hg

Nose bleeding occurs at high altitudes because :

1. the blood pressure becomes less than the atmospheric pressure
2. the blood pressure becomes equal to the atmospheric pressure
3. the blood pressure becomes more than the atmospheric pressure
4. not related with atmospheric pressure.

Simple barometer was first designed by :

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