Advertisements
Advertisements
प्रश्न
A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out, the pressure in the liquid near the bottom of the liquid will
विकल्प
increase
decrease
remain constant
first decrease and then increase
उत्तर
decrease
As the air inside the jar is pumped out, the air pressure decreases. Thus, the pressure in the liquid near the bottom of the beaker decreases.
APPEARS IN
संबंधित प्रश्न
Explain why Hydrostatic pressure is a scalar quantity even though the pressure is force divided by area.
The unit of thrust is ..........
The feet of lizards act like
Why do camels or elephants have broad feet?
Why is the bottom part of the foundation of a building made wider?
How much thrust will be required to exert a pressure of 20,000 Pa on an area of 1 cm2.
Calculate the pressure exerted on a surface of 0.5 m2 by a thrust of 100 kgf.
Multiple Choice Question.
A hydraulic lift is designed to lift heavy objects of maximum mass 2000 kg. The area of cross-section of piston carrying the load is 2.25 × 10-2 m2. What is the maximum pressure the smaller piston would have to bear?
A drinking straw works on the existence of ______.
Match the following.
| 1. | Density | hρg |
| 2. | 1 gwt | Milk |
| 3. | Pascal’s law | `"Mass"/" Volume"` |
| 4. | Pressure exerted by a fluid | Pressure |
| 5. | Lactometer | 980 dyne |
If the same force is made to act on a larger area, the pressure ______.
Pressure is directly proportional to the area of contact.
Assertion: The pressure at the bottom of the sea is lesser than that near the surface.
Reason: The pressure exerted by a liquid depends upon the depth of the liquid and density of the liquid.
Explain the variation of the pressure exerted by liquid with respect to the following factors.
- Amount of liquid
- Depth
- Shape and size of the container
Determine the pressure when a force of 200 N acts on the area
- 20 m2
- 8 m2
Give reasons why:
heavy trucks are fitted with 6 to 8 wheels
Intermolecular forces are stronger in ______.
Assertion (A): Air gets thinner with increasing altitude.
Reason (R): The atmospheric pressure increases as we go up in mountains.
The force exerted by liquid perpendicular to the surface of the body is equal to the product of ______ at that point.
Pressure is a scalar quantity because ______.
- it is the ratio of force to area and both force and area are vectors.
- it is the ratio of the magnitude of the force to area.
- it is the ratio of the component of the force normal to the area.
- it does not depend on the size of the area chosen.
