help@askiitians.com

1800-150-456-789

Thermal Physics> A wire is suspended vertically from a rig...

question mark

A wire is suspended vertically from a rigid support.when loaded with a steel weight in air, the wire extend by 16cm.when the weight is completely immersed in water,the extension is reduced to 14 cm . The relative density of the material of the weight is (in gm/cm^3)?

Sourabh , 7 Years ago

Grade 11

2 Answers

Eshan

Last Activity: 6 Years ago

From Young’ s theory, the extension in the string is directly proportional to the tension in the string.

When weight is in air, $T=mg$

When weight is immersed in water, $T'=mg-V\rho g=Vdg-V\rho g=mg(1-\dfrac{\rho}{d})$

$\implies 1-\dfrac{\rho}{d}=\dfrac{14}{16} \implies 1-\dfrac{1}{\rho_{rel}}=\dfrac{14}{16} \implies\rho_{rel}=8$

Gitanjali Rout

Last Activity: 6 Years ago

$\implies 1-\dfrac{\rho}{d}=\dfrac{14}{16} \implies 1-\dfrac{1}{\rho_{rel}}=\dfrac{14}{16} \implies\rho_{rel}=8$ $T`=mg-V\rho g=Vdg-V\rho g=mg(1-\dfrac{\rho}{d})$ When weight is immersed in water, $T=mg$ From Young’ s theory, the extension in the string is directly proportional to the tension in the string.When weight is in air,

Provide a better Answer & Earn Cool Goodies

Enter text here...

LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

Full Live Access

Study Material

Live Doubts Solving

Daily Class Assignments

Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

A container filled with a sample of an Idea gas at the pressure of 1.5atm. the gas is compressed isothermal ly to one fourth of its original volume. What is the new pressure of the gas?

thermal physics

0 Answer Available

Last Activity: 2 Years ago

how do we know the electric field due to an electric dipole of dipole moment P at distance r from the centre of dipole is fiven by .. where theta is angle between p amd r vector..

thermal physics

0 Answer Available

Last Activity: 2 Years ago

A A mole of helium gas initially at stp undergoes an isovolumetric process in which its pressure falls to half its initial value. The work done by gas is

thermal physics

0 Answer Available

Last Activity: 2 Years ago

5000 J of heat are added to two moles of an ideal monatomic gas, initially at a temperature of 500 K, while the gas performs 7500 J of work. What is the final temperature of the gas? step by step please

thermal physics

1 Answer Available

Last Activity: 3 Years ago

Please help me with theanswer of this questionrelated to radiation graph

thermal physics

0 Answer Available

Last Activity: 3 Years ago

View all Questions