A glass flask weighing 390 g having internal volume 500 cc just floats

A Glass Flask Weighing 390 G Having Internal Volume 500 Physics Question

A glass flask weighing 390 g having internal volume 500 cc just floats when half of it is filled with water. Specific gravity of the glass is

Options

(a) 2.8
(b) 1.8
(c) 1
(d) 2.5

Correct Answer:

2.8

Explanation:

Weight of the flask + 250 c.c. of water is balanced by V₂ gm of water.

Where V₂ is the external volume.

.·. (390 + 250)g = V₂ × 1 × g ⇒ V₂ = 640 c.c.

.·. Volume of the material = (640 – 500) c.c. = 140 c.c.

.·. Density of glass = 390 g / 140 c.c. = 2.8 g/c.c.

i.e. Specific gravity = 2.8

Related Questions:

  1. Imagine a light planet revolving around a very massive star in a circular
  2. If an A.C. mains supply is given to be 220 V, what would be the average e.m.f.
  3. Three resistances 2Ω, 3Ω and 4Ω are connected in parallel. The ratio of currents passing
  4. A particle is executing the motion x=Acos (ωt-θ). The maximum velocity of the particle is
  5. The temperature coefficient of resistance of an alloy used for making resistor is

Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*