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प्रश्न
What is the use of altimeter?
उत्तर
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संबंधित प्रश्न
Name and state the principle on which a hydraulic press works. Write one use of hydraulic press.
In a hydraulic machine, a force of 2 N is applied on the piston of area of cross section 10 cm2. What force is obtained on its piston of area of cross section 100 cm2 ?
What should be the ratio of area of cross section of the master cylinder and wheel cylinder of a hydraulic brake so that a force of 15 N can be obtained at each of its brake shoe by exerting a force of 0.5 N on the pedal ?
A force of 50 kgf is applied to the smaller piston of a hydraulic machine. Neglecting friction, find the force exerted on the large piston, if the diameters of the pistons are 5 cm and 25 cm respectively.
The atmospheric pressure at a place is 650 mm of Hg. Calculate this pressure in Pascals (Pa).
The following figure shows a manometer containing a liquid of density p. The limb P of the manometer is connected to a vessel V and the limb Q is open to atmosphere. The difference in the levels of liquid in the two limbs of the manometer is h as shown in the diagram. The atmospheric pressure is P0.
(i) What is the pressure on the liquid surface in the limb Q?
(ii) What is the pressure on the liquid surface in the limb P?
State and explain Pascal's law of transmission of pressure.
The density of iron is 7800 kg m-3. What do you mean by this statement? What is density of water at 40C?
