What must be the stress in a stretched steel wire for the speed of longitudinal waves to be equal to 100 times the speed of transverse waves ? (Y for steel =`20xx10^10N/m^3`).

A copper wire is stretched by one percent of its length. What is the energy stored per unit volume of the wire if Y for its material is 11 xx 10^10 N/m^2 .

Find the speed of longitudinal sound wave through silver, given that Young's modules of silver =7.75xx10^10N/m^2 and density of silver =1.05xx10^3kg/m^3 .

A half kg weight is tied to one end of a metal wire of length 0.6 m . By holding the other end in the hand, the wire is whirled in a vertical and has an angular velocity of 2 r.p.s. at bottom of the circle. What is the elongation of the wire at the lowest point ? Area of cross-section of the wire = 5 x 10 ^(-6) m^2 . Y for steel = 2 x 10^10 N/m^2 .

A steel rod when measured with a zinc scale (alpha = 26 xx 10^(-6)//^@C) appears to be 1 m long when both rods are at 20^@C . If the zinc scale was graduated at 0^@C , what is the true length of the steel rod at 0^@C ? alpha for steel = 12 xx 10^(-6)//^@C .

What is the tension in a 3m cord, whose mass is 0.15kg, if a transverse wave is observed to travel in the cord with a speed of 20m/s ?

The radius of a cupper wie is 4 mm . What force is required to stretch the wire by 20% of its length, assuming that the elastic limit is not exceeded ? (Y = 1.2 xx 10^11 N/m^2)

A mass of 4kg is hung from a metal wire of radius 0.5 mm and length 3m. Find the extension produced in the wire. What should be minimum radius of the wire so that the elastic limit of 20 xx 10^7 N/m^2 of the metal wire is not exceeded ? Y=20x10^10N/m^2.

The radius of a copper rod is 4 mm . What force is required to stretch the rod by 10 percent of its length ? Y for copper = 12 xx 10^10 N/m^2 .