WBJEE · Physics · Mechanical Properties of Fluids
A body when fully immersed in a liquid of specific gravity 1.2 weighs 44 gwt. The same body when fully immersed in water weighs 50 gwt. The mass of the body is
- A 36 \mathrm{g}$
- B 48 \mathrm{g}$
- C 64 \mathrm{g}$
- D \(80 \mathrm{g}\)
Answer & Solution
Correct Answer
(D) \(80 \mathrm{g}\)
Step-by-step Solution
Detailed explanation
Balancing equation \[ W=m g-V \rho g \] Hence, \[ \begin{array}{l} 44=m-1.2 \mathrm{V} \\ 50=m-V \end{array} \] On solving Eqs. (i) and (ii) we get \[ m=80 \mathrm{g} \]
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A bullet of mass \(4.2 \times 10^{-2} \mathrm{kg},\) moving at a speed of \(300 \mathrm{ms}^{-1}\), gets stuck into a block with a mass 9 times that of the bullet. If the block is free to move without any kind of friction, the heat generated in the process will beWBJEE 2017 Medium
- \(A\) metal wire of circular cross-section has a n'sistance \(R_{1}\). The wire is now stretched without breaking, so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now beromes \(R_{2},\) then \(R_{2}: R_{1}\) isWBJEE 2015 Easy
- Two spheres \(\mathrm{S}_1\) and \(\mathrm{S}_2\) of masses \(\mathrm{m}_1\) and \(\mathrm{m}_2\) respectively collide with each other. Initially \(\mathrm{S}_1\) is at rest and \(\mathrm{S}_2\) is movingwith velocity v along x -axis. After collision \(\mathrm{S}_2\) has a velocity \(\frac{\mathrm{v}}{2}\) in a direction perpendicular to the original direction. The sphere \(\mathrm{S}_1\) moves after collisionWBJEE 2025 Medium
- A spring of force constant \(k\) is cut into three equal parts. The force constant of each part would beWBJEE 2010 Medium
-
As shown in the figure, a pump is designed as horizontal cylinder with a piston having area A and an outlet orifice having an area ' \(a\) '. The piston moves with a constant velocity under the action of force \(F\). If the density of the liquid is \(\rho\), then the speed of the liquid emerging from the orifice is, (assume \(A > > a\) )WBJEE 2023 Hard - A luminous object is separated from a screen by distance \(d\). A convex lens is placed between the object and the screen such that it forms a distinct image on the screen. The maximum possible focal length of this convex lens isWBJEE 2014 Medium
More PYQs from WBJEE
- The correct order of decreasing length of the bond as indicated by the arrow in the following structures is
WBJEE 2014 Medium - Let \(A\) be a set containing \(n\) elements. \(A\) subset \(P\) of \(A\) is chosen, and the set \(A\) is reconstructed by replacing the elements of \(P\). A subset \(Q\) of \(A\) is chosen again. The number of ways of choosing \(P\) and \(Q\) such the \(Q\) contains just one element more than \(P\) isWBJEE 2023 Medium
- \(1+{ }^{n} C_{1} \cos \theta+{ }^{n} C_{2} \cos 2 \theta+\ldots+{ }^{n} C_{n} \cos n \theta\) equalsWBJEE 2016 Medium
- A weak acid of dissociation constant \(10^{-5}\) is being titrated with aqueous \(\mathrm{NaOH}\) solution. The \(\mathrm{pH}\) at the point of one-third neutralisation of the acid will beWBJEE 2010 Hard
- The sum of \(n\) terms of the following series \(1^{3}+3^{3}+5^{3}+7^{3}+\ldots\) isWBJEE 2016 Medium
- Chords AB & CD of a circle intersect at right angle at the point P. If the length of AP, PB, CP, PD are 2, 6, 3, 4 units respectively, then the radius of the circle isWBJEE 2024 Easy