Advertisements
Advertisements
प्रश्न
The pressure in a liquid at two points in the same horizontal plane are equal. Consider an elevator accelerating upward and a car accelerating on a horizontal road. The above statement is correct in
पर्याय
the car only
the elevator only
both of them
neither of them
Advertisements
उत्तर
the elevator only
The two points in the same horizontal line will not have equal pressure if the liquid is accelerated horizontally. There should be vertical acceleration.
APPEARS IN
संबंधित प्रश्न
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 S.I. unit of pressure is pascal.
Pressure is the thrust acting on a surface of ........... area.
Pressure is reduced if .................... increases.
The feet of lizards act like
How is the thrust related to pressure?
Calculate the pressure in pascal exerted by a force of 300 N acting normally on an area of 30 cm2.
A boy weighing 60 kgf stands on platform of dimensions 2.5 cm x 0.5 cm. What pressure in pascal does he exert?
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?
Find the pressure 200m below the surface of the ocean if pressure on the free surface of liquid is one atmosphere. (Density of seawater = 1060 kg/m3)
In a hydraulic lift, the input piston had surface area 30 cm2 and the output piston has surface area of 1500 cm2. If a force of 25 N is applied to the input piston, calculate weight/force on output piston.
Consider the statement given below and choose the correct option.
Assertion: Broad straps are used in bags.
Reason: Broad straps last for long.
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 why the cutting instruments are sharpened.
Give reasons why:
a single nail pricking the body is painful when compared to lying on a bed of nails.
Intermolecular forces are stronger in ______.
What is the SI unit of pressure?
Assertion (A): Wide wooden sleepers are kept below railway lines to reduce pressure on the railway tracks and prevent them from sinking into the ground.
Reason (R): Pressure is directly proportional to the area in which it is acting.
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.
