The densities of two substance are `2:3` and their specific heats are 0.12 and 0.09 respectively.compare their capacities per unit volume.

The thermal capacity of 8 liters of a liquid A is equal to the thermal capacity of 10 liters of liquid B.If the densities of the liquids A and B are 0.5 g/ cm^3 and 0.6 g/ cm^3 respectively ,find the ration of their specific heats.

What are the significances of quantum number l and ml? Designate the two orbitals having n==1,l=0 and n=3,l=2. respectively. Explain- there is no existence of 2d orbital.

Hasan buys two kinds of cloth materials for school uniforms, shirt material that costs him Rs 50 per metre and trouser material that costs him Rs 90 per metre. For every 2 meteres of the trousers material he buys 3 metres of the shirt materials. He sells the materials at 12% and 10% profit respectively. His total sale is Rs 36,660. How much trouser material did he buy?

From the kinetic theory of gas, prove that P= frac(2)(3)E , where E is the kinetic energy per unit volume of the gas.

Water flows horizontally through a pipeline of varying cross-section. At two points A and B, the diameters are 0.6 m and 0.2m. The pressure difference between the points is 1m. Column of water. Calculate the volume of water flowing per second.

Two long straight thin conductors carrying currents I_1 and I_2 respectively along the same direction are placed parallel to each other in air. Derive an expression for the force per unit length acting on any one of the conductors and hence define one ampere current.