The speed of a transverse wave along a uniform metal wire, when it is under a tension of `1000 g wt ` is `68m/s`.If the density of metal is `7900 kg/m^3`, find the area of cross section of the wire.

A wire has length 10 m and resistance 20 Omega If the resistivity of the material of the wire is 6 times 10^(-7) Omega.m , find the area of cross section of the wire.

Find the velocity of a transverse wave along a string of linear density 3.6 X 10^-3 kg//m when it is under a tension of 1.8 kg-wt. g = 9.8 m/s^2

The speed of a transverse wave, on a string of density 100 kg//m^3 and area of cross-section 10 mm^2 under a tension of 10^3 N, is

Solve the following problems : The density of a metal is 10.8 x 10^3 kg/m^3 . Find the relative density of metal .

Solve the following example : The density of a metal is 1.8 xx 10^3 kg//m^3 . Find the relative density of the metal.

The speed of the wind passing over the wings of a small aeroplane is 70 m/s and below the wing is 60 m/s. If the mass of the plane is 1000 kg and the area of wing is 14 m^(2), then what will be ther net vertical force on the aeroplane ? ? (Density of air =1.2 kg//m^(3) and g=10 m//s^(2))

A capillary tube 0.14mm in diameter has its lower end immersed in a liquid of surface tension 0.054 N//m . If the density of a liquid is 860 kg//m^3 , find the height to which the liquid rises in the tube.(Angle of contract of liquid with glass is 28^@ and g=9.8 m//s^2 ).

One end of uniform wire of length L and of weight W is attached rigidly to a point in the roof and a weight W_(1) is suspended from its lower end. If s is the area of cross section of the wire, the stress in the wire at a height ( 3L//4 ) from its lower end is

The diameter and thickness of a hollow metallic sphere are 12 cm and 0.01 m respectively. The density of the metal is 8.88 gm per cm^3 . Find the outer surface area and mass of the sphere.