Physics
A barometer is used :
- to measure atmospheric pressure
- for weather forecasting
- as an altimeter to measure heights
- all of the above
Fluids Pressure
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Answer
all of the above
Reason — Measuring atmospheric pressure, weather forecasting, measuring heights, all these are valid uses of a barometer.
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The atmospheric pressure at earth surface is P1 and inside mine is P2. They are related as:
- P1 = P2
- P1 > P2
- P1 < P2
- P2 = 0
Simple barometer was first designed by :
- Sir Issac Newton
- Pascal
- Torricelli
- Thomas Alva Edison
At the summit of Mount Everest, the atmospheric pressure is :
- only 40% of the atmospheric pressure at sea level
- only 60% of the atmospheric pressure at sea level
- only 30% of the atmospheric pressure at sea level
- only 50% of the atmospheric pressure at sea level
Mercury is preferred as a barometric liquid because :
- its density is high
- its vapour pressure is negligible
- it neither wets nor sticks to the glass
- all of the above