मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

Equal Mass of Three Liquids Are Kept in Three Identical Cylindrical Vessels A, B and C. the Densities Are ρA, ρB, ρC with ρA < ρB < ρC. the Force on the Base Will Be

Advertisements
Advertisements

प्रश्न

Equal mass of three liquids are kept in three identical cylindrical vessels A, B and C. The densities are ρA, ρB, ρC with ρA < ρB < ρC. The force on the base will be

पर्याय

  • maximum in vessel A

  • maximum in vessel B

  • maximum in vessel C

  • equal in all the vessels

MCQ
Advertisements

उत्तर

 equal in all the vessels
The force on the base is given by
F = hρg × A
⇒ F = (hAρ)g
⇒ F = (Volume ×Density) × g
⇒ F = mg}

In the question, the masses are equal. So, the force on the base is the same in all cases.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 13: Fluid Mechanics - MCQ [पृष्ठ २७१]

APPEARS IN

एचसी वर्मा Concepts of Physics Volume 1 and 2 [English]
पाठ 13 Fluid Mechanics
MCQ | Q 4 | पृष्ठ २७१

संबंधित प्रश्‍न

A U-tube contains water and methylated spirit separated by mercury. The mercury columns in the two arms are in level with 10.0 cm of water in one arm and 12.5 cm of spirit in the other. What is the specific gravity of spirit?


Does it matter if one uses gauge instead of absolute pressures in applying Bernoulli’s equation? Explain.


A manometer reads the pressure of a gas in an enclosure as shown in Figure (a) When a pump removes some of the gas, the manometer reads as in Figure (b) The liquid used in the manometers is mercury and the atmospheric pressure is 76 cm of mercury.

(a) Give the absolute and gauge pressure of the gas in the enclosure for cases (a) and (b), in units of cm of mercury.

(b) How would the levels change in case (b) if 13.6 cm of water (immiscible with mercury) are poured into the right limb of the manometer? (Ignore the small change in the volume of the gas).

 


A satellite revolves round the earth. Air pressure inside the satellite is maintained at 76 cm of mercury. What will be the height of mercury column in a barometer tube 1 m long placed in the satellite?


The three vessels shown in the following figure have same base area. Equal volumes of a liquid are poured in the three vessels. The force on the base will be


Shows in the following figure a siphon. The liquid shown is water. The pressure difference PB − PAbetween the points A and B is


A barometer kept in an elevator reads 76 cm when it is at rest. If the elevator goes up with increasing speed, the reading will be ______.


A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is


Figure shows a capillary tube of radius r dipped into water. If the atmospheric pressure is P0, the pressure at point A is


The surface of water in a water tank on the top of a house is 4 m above the tap level. Find the pressure of water at the tap when the tap is closed. Is it necessary to specify that the tap is closed?


The heights of mercury surfaces in the two arms of the manometer shown in figure are 2 cm and 8 cm.
Atmospheric pressure = 1.01 × 105 N−2. Find (a) the pressure of the gas in the cylinder and (b) the pressure of mercury at the bottom of the U tube.


The weight of an empty balloon on a spring balance is W1. The weight becomes W2when the balloon is filled with air. Let the weight of the air itself be w. Neglect the thickness of the balloon when it is filled with air. Also neglect the difference in the densities of air inside and outside the balloon.

(a) W2 = W1
(b) W2 = W1 + w
(c) W2 < W1 + w
(d) W2 > W1


A closed vessel is half filled with water. There is a hole near the top of the vessel and air is pumped out from this hole.
(a) The water level will rise up in the vessel.
(b) The pressure at the surface of the water will decrease
(c) The force by the water on the bottom of the vessel will decrease
(d) The density of the liquid will decrease


A glass full of water has a bottom of area 20 cm2, top of area 20 cm2, height 20 cm and volume half a litre. 
(a) Find the force exerted by the water on the bottom.
(b) Considering the equilibrium of the water, find the resultant force exerted by the sides of the glass on the water. Atmospheric pressure = 1.0 × 105 N/m2. Density of water 1000 kg/m3 and g = 10 m/s2. Take all numbers
to be exact.


If water be used to construct a barometer, what would be the height of water column at standard atmospheric pressure (76 cm of mercury) ?


Considering the pressure p to be proportional to the density, find the pressure p at a height h if the pressure on the surface of the earth is p0.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×