The lifting power of helium is______of hydrogen.

Calculate the temperature at which sound travels in hydrogen with the same speed as in helium at N.T.P. The density of helium is twice that of hydrogen.

The ratio of densities of helium and hydrogen is 4 : 2. Calculate the temperature at which the speed of sound in helium will be equal to speed in hydrogen at 27^(@) C ?

If the mass defect in the formation of helium from hydrogen is 0.5%, then the energy obtained, in kWH, in forming helium from 1 kg of hydrogen will be-

Doubly ionised helium atoms and hydrogen ions are accelerated from rest through the same potential drop. The ratio of the final velocities of the helium and the hydrogen ion is

In her science class, Jyoti learned that the atomic weight of Helium is 4.0030, of Hydrogen is 1.0080, and of Oxygen is 16.0000. Find the difference between the atomic weights of: (a) Oxygen and Hydrogen (b) Oxygen and Helium (c) Helium and Hydrogen

The primary reason balloons are filled with helium instead of hydrogen is