A block of mass 4 kg is suspended from the ceiling with the help of a steel wire of radius 2mm and negligible mass. Find the stress in the wire. `(g=pi^(2))` (A) `4.0xx10^(6) N//m^(2)` (B) `3.14xx10^(6) N//m^(2)` (C) `3xx10^(5) N//m^(2)` (D) `2.0xx10^(6) N//m^(2)`

The adjacent graph shows the extra extension (Deltax) of a wire of length 1m suspended from the top of a roof at one end with an extera load Deltaw connected to the other end If the cross sectional area of the wire is 10^(-5)m^(2) calculate the Young's modulus of the meterial of the wire (A) 2 xx 10^(11) N//m^(2) (B) 2 xx 10^(-11)N//m^(2) (c) 3 xx 10^913) N//m^(3) (D) 2 xx 10^(16)N//m^(2) .

Find the greatest length of steel wire that can hang vertically without breaking. Breaking stress of steel =8.0xx10^(8) N//m^(2) . Density of steel =8.0xx10^(3) kg//m^(3) . Take g =10 m//s^(2) .

Find the greatest length of steel wire that can hang vertically without breaking.Breaking stress of steel =8.0xx10^(8) N//m^(2) . Density of steel =8.0xx10^(3) kg//m^(3) . Take g =10 m//s^(2) .

Hardness of water is 200 ppm. The normality and molarity of CaCO_3 in the water is (a). 2xx10^(-6)(N,2xx10^(-6)M (b). 4xx10^(-2)N,2xx10^(-2)M (c). 4xx10^(-3)N,2xx10^(-3)M (d). 4xx10^(-1)N,2xx10^(-1)M

Hardness of water is 200 ppm. The normality and molarity of CaCO_3 in the water is (a). 2xx10^(-6)(N,2xx10^(-6)M (b). 4xx10^(-2)N,2xx10^(-2)M (c). 4xx10^(-3)N,2xx10^(-3)M (d). 4xx10^(-1)N,2xx10^(-1)M

A body of mass 1 kg is fastened to one end of a steel wire of cross- section area 3 xx 10^(-6)m^(2) and is rotated in horizantal circle of radius 20 cm with a constant speed 2 m//s . Find the elongation of the wire (Y= 2 xx 10^(11) N//m^(2))

On increasing the length by 0.5 mm in a steel wire of length 2 m and area of cross section 2 mm^2 , the force required is [Y for steel =2.2xx10^11(N)/(m^2) ]

A load is suspended from a steel wire with a radius of 1mm. The load extends the wire the same amount as does heating by 20^(@)C . Find the load (approx). alpha_("steel") = 1.1 xx 10^(-5) K^(-1) , Young's modulus = 21.6 xx 10^(10) N//m^(2)

The density of the material of a wire used in sonometer is 75xx10^(-2) kg //m^(3) . If the stress on the wire is 3.0xx10^(4) N//m^(2) , the speed of transverse wave in the wire will be