A ball weghing 4 kg of density `4000 kg//m^(3)` is completely immersed in water of density `10^(3)kg//m^(3) `find the force of buoyancy on it. `(given g=10m//s^(2))`

The density of sodium is 5.96 g cm^(-3) . What is the density in kg m^(-3) ?

A ball weighing 5 kg is being rotated by means of a cord 2 m long.if its velocity is 6 m s^-1 ,find the force that tends to break the cord.

An element X (At. Wt. =24) forms FCC lattice. If the edge length of lattice is 4 xx 10^(-8) cm and the observed density is 2.4 xx 10^(3 )kg//m^(3) . Then the percentage occupancy of lattice point by element X is : (N_(A) = 6 x 10^(23))

Relative density of gold is 19.3. The density of water is 1000 kg m^-3 . What is the density of gold in SI units.

A force of 100 N is able rp produce an acceleration 8 m s^-2 in body of mass 10 kg. finf the value of force of friction.

A tank of capacity 10^3 kg is placed at the top of a house 10 m high.This tank is filled by a motor in 30 minutes by lifting water from a 20 m deep well.Find the power of motor(Take g=10m s^(-2) .

Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle 30^@ with each other. When suspended in a liquid of density 800 kg m^-3 , the angle remains the same. Wahat is the dielectric constant of the liquid? The density of the material of the sphere is 1600 kg m^-3

A stress of 10^7 N m^-2 is required to break a material of density 4 xx 10^4 kg m^-3 . Calculate the length of a wire of this material, which can break under its own weight.