Advertisements
Advertisements
प्रश्न
A gum bottle rests on its base. If it is placed upside down, how does the pressure change?
Advertisements
उत्तर
Lesser area, larger is the pressure.
APPEARS IN
संबंधित प्रश्न
Toricelli’s barometer used mercury. Pascal duplicated it using French wine of density 984 kg m–3. Determine the height of the wine column for normal atmospheric pressure.
A plane is in level flight at a constant speed and each of its two wings has an area of 25 m2. If the speed of the air is 180 km/h over the lower wing and 234 km/h over the upper wing surface, determine the plane’s mass. (Take air density to be 1 kg m–3).
The pressure on a surface increases with an increase in the thrust on the surface.
Name two factors on which the pressure on a surface depends.
A normal force of 200 N acts on an area of 0.02 m2. Find the pressure in pascal.
The figure shows a brick of weight 2 kgf and dimensions 20 cm × 10 cm × 5 cm placed in three different positions on the ground. Find the pressure exerted by the brick in each case.
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?
Explain why the cutting instruments are sharpened.
Fluids in general are ______.
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.
