Mechanical Prop...

Two wires are made of the same material and have the same volume. However wire 1 has cross-sectional area A and wire 2 has cross-sectional area 3 A. If the length of wire 1 increased by $$\displaystyle \Delta x$$ on applying force F, how much force is needed to stretch wire 2 by the same amount?

How much force is required to produce an increase of $$0.2\%$$ in the length of a brass wire of diameter $$0.6\ mm$$? (Young's modulus for brass $$= 0.9 \times 10^{11} N / m^2$$) 

The approximate depth of an ocean is $$2700\ m$$. The compressibility of water is $$45.4\times 10^{-11}Pa^{-1}$$ and density of water is $$10^{3} kg/m^{3}$$. What fractional compression of water will be obtained at the bottom of the ocean?

When a body undergoes a linear tensile strain if experience a lateral contraction also. The ratio of lateral contraction to longitudinal strain is known as

Which of the following is not dimension less

A wire suspended vertically from one of its ends is stretched by attaching a weight of $$200N$$ to the lower end. The weight stretches the wire by $$1mm$$. Then the elastic energy stored in the wire is 

Energy per unit volume in a stretched wire is equal to 

Longitudinal strain can be produced in :

Out of the following whose elasticity is independent of temperature

A wire ($$Y=2\times {10}^{11}N/m$$) has length $$1m$$ and area $$1m{m}^{2}$$. The work required to increased its length by $$2mm$$ is