Question 2 :
The atmospheric pressure at earth’s surface is P{tex}_1{/tex} and inside mine is P{tex}_2{/tex}. They are related as :
Question 4 :
When a body is wholly or partially immersed in a liquid, it experiences a buoyant force which is equal to :
Question 5 :
A cube of each side {tex} 5 \mathrm { cm } {/tex} is placed inside a liquid. The pressure at the centre of one face of cube is {tex} 10 \mathrm { Pa } {/tex}. Calculate the thrust exerted by the liquid on this face.
Question 6 :
The S.I. unit of upthrust is given by the following unit:
Question 8 :
The pressure inside a liquid of density p at a depth h is:
Question 9 :
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 ?
Question 11 :
Relative density of a substance is expressed by comparing the density of that substance with the density of :
Question 13 :
For a floating body, its weight W and upthrust FB on it are related as listed below:
Question 15 :
What fraction of metal of density {tex} 3400 \mathrm{kgm}^{-3} {/tex} will be above the surface of mercury of density {tex} 13600 \mathrm{kgm}^{-3} {/tex}, while floating in mercury?
Question 16 :
The force experienced by a body when partially or fully immersed in water is called :
Question 17 :
A body has density {tex} 9.6 \mathrm{gcm}^{-3} {/tex}. Its density in SI system is :
Question 19 :
A body floats in a liquid A of density with a part of it submerged inside the liquid, while in liquid B of density it is totally submerged inside the liquid. The densities and are related as shown below:
Question 20 :
The pressure {tex}P_1{/tex} at the top of a dam and {tex}P_2{/tex} at a depth h form the inside water (density p) are related as :
Question 21 :
A dam for water reservoir is built thicker at the bottom than at the top because :
Question 22 :
Pressure at a point inside a liquid does not depend on :
Question 24 :
A wooden block floats in alcohol with {tex} 3 / 8 {/tex} of its length above alcohol. If it is made to float in water, what fraction of its length is above water? Density of alcohol is {tex} 0.80 \mathrm{~g} {/tex} {tex} \mathrm{cm}^{-3} {/tex}
Question 25 :
A barometer with mercury reads {tex} 75 \mathrm { cm } {/tex}. when {tex} 3 \mathrm { cm } ^ { 3 } {/tex} of atmosphericair is introduced into the tube, the mercury suddenly falls to a height of {tex} 65 \mathrm { cm } {/tex} and the air column length above the mercury is obtained to be {tex} 15 \mathrm { cm } . {/tex} What is the cross-sectional area of the barometer tube?
Question 26 :
The pressure exerted by {tex} 50 \mathrm{~kg}\left(\mathrm{~g}=10 \mathrm{~m} / \mathrm{s}^{2}\right) {/tex} on an area of cross section of {tex} 2 \mathrm{~m}^{2} {/tex} is
Question 27 :
A body will experience minimum upthrust when it is completely immersed in which of the following liquids:
Question 28 :
The ratio between the mass of a substance and the mass of an equal volume of water at {tex} 4^{\circ} \mathrm{C} {/tex} is called :
Question 30 :
The apparent weight of a body in a fluid is :
Question 31 :
A body of weight W is floating in a liquid. Its apparent weight will be observed as listed below:
Question 32 :
A square plate of side {tex} 10 \mathrm { m } {/tex} is placed horizontally {tex} 1 \mathrm { m } {/tex} below the surface of water. The atmospheric pressure is {tex} 1.013\times 10 ^ { 5 } \mathrm { Nm } ^ { - 2 } {/tex}. Calculate the total thrust on the plate.
Question 33 :
Thrust acting perpendicularly on the unit surface area is called :
Question 34 :
With the increase in the density of the fluid, the upthrust experienced by a body immersed in it :
Question 36 :
What fraction of an iceberg of density {tex} 910 \mathrm{kgm}^{-3} {/tex} will be above the surface of sea water of density {tex} 1170 \mathrm{kgm}^{-3} {/tex} ?
Question 37 :
The pressure {tex}P_1{/tex} at a certain depth in river water and {tex}P_2{/tex} at the same depth in sea water are related as:
Question 38 :
A solid weighs 200 gf in air and 160 gf in water. Calculate its density. What is the volume of the solid?
Question 40 :
A block of wood floats on water with {tex} \frac { 2 } { 5 } {/tex} th of its volume above the water surface. Calculate the density of wood.
Question 41 :
A body of density sinks in a liquid of density . The densities and are related as shown below:
Question 42 :
The phenomenon due to which a solid experiences upward force when immersed in water is called :
