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प्रश्न
State two advantages of an aneroid barometer over a simple barometer.
उत्तर
Aneroid barometer has no liquid and it is portable. It is calibrated to read directly the atmospheric pressure.
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संबंधित प्रश्न
Write the numerical value of the atmospheric pressure on the earth surface in pascal.
Explain the following :
A balloon collapses when air is removed from it.
A partially inflated balloon is placed inside a bell jar connected to a vacuum pump. On creating vacuum inside the bell jar, balloon gets more inflated. How does the pressure change: increase, decrease or remains same, inside the (a) bell jar, (b) balloon?
How will you show that there is vacuum above the surface of mercury in a barometer? What name is given to this vacuum?
Give two reasons for use of mercury as a barometric liquid.
Describe an experiment to demonstrate that air exerts pressure.
Air pressure is expressed in ______.
It is much easier to burst an inflated balloon with a needle than by a finger. Explain.
Tyre pressure of 30psi is almost ______ the atmospheric pressure.
