Mechanical Prop...

A spiral spring is stretched by a weight attached to it. The strain is

A $$10 \ meter$$ long thick rubber pipe is suspended from one of its ends. The extension produced in the pipe under its own weight will be :$$(Y=5\times10^{6}N/m^{2}$$ and density of rubber =$$ 1500 \ kg/m^{3}$$)

A petite young woman of $$50\ kg$$ distributes her weight equally over her high-heeled shoes. Each heel has an area of $$0.75cm^2$$. Find the pressure exerted by each heel? Take $$g=10 m/s^2$$

Proof resilience is related to

Outside a house, $$1 km$$ from ground zero of a $$100 $$ kiloton nuclear bomb explosion, the pressure will rapidly rise to as high as $$2.8$$ atm while the pressure inside the house is $$1$$ atm. If the area outside the house is $$50\:m^2$$. The resulting net force exerted by the air in front of the house is :

A wire $$1 m$$ long has cross-section $$1 mm^{2}$$ and $$Y = 1.2\times10^{11}Pa$$. Find the work done in stretching it by $$2 mm.$$

If S is the stress and Y is Young's modulus of the material of a wire, the energy stored in the wire per unit volume is :

A gas undergoes a process in which its pressure P and volume V are related as $$VP^n=$$ constant. The bulk modulus for the gas in this process is:

A vertical steel post of diameter $$25 cm$$ and length $$2.5 m$$ supports a weight of $$8000 kg$$. Find the change in length produced.

Which one of the following substance possesses the highest elasticity?