Mechanical Prop...

The radii and young's modulus of two uniform wires A & B are in the ratio 2:1 and 1:2 respectively. Both the wires are subjected to the same longitudinal force. If increase in the length of wire A is 1%. Then the percentage increase in length of wire B is

 The apparatus used to determine Young's modulus of the material of a given wire is called 

The Young's experiment is performed with the lights of blue $$\left( \lambda =4360\mathring { A }  \right) $$ and green colour $$\left( \lambda =5460\mathring { A }  \right) ,$$ if the distance of the $${ 4 }^{ th }$$ fringe from the centre is x, then 

Two metal rods of the same length and area of crosssection are fixed ends to end between rigid supports. The materials of the rods have Young moduli $$\mathrm { Y } _ { 1 } \text { and } \mathrm { Y } _ { 2 }$$ , and coefficients of linear expansion $$\alpha _ { 1 } \text { and } \alpha _ { 2 }$$ and When rods are cooled the junction between the rods does not shift if:

A metal wire is first stretched beyond its elastic limit and then released It 

A copper wire and a steel wire of the same diameter and length 1m and 2m respectively are connected end to end and a force is applied which stretches their combined length by 1 cm. How much each wire is elongated respectively. Y of copper =1.2$$\times { 10 }^{ 4 }$$

The Bulk modulus for an incompressible liquid is 

The force constant of a wire does not depend on

A sound wave of wavelength $$0.31\,m$$ is travelling in air. The pressure at a point varied from $$(10^5 - 14)$$ pascal to $$(10^5 +14)$$ pascal and particles vibrate in $$SHM$$ with amplitude $$5.5\times 10^{-6}\,m.$$Bulk modulus of air is 

What will be the stress at $$-20^{o}C$$, if a steel rod with a cross-sectional area of $$150 mm^2$$ is stretched between two fixed points? The tensile load at $$20^{o}C$$ is $$5000 N $$ : ( Assume $$\alpha = 11.7 \times 10^{-6}/C$$ and $$Y = 200 \times 10^{11} N/m^2$$)