Physics Test - ...

A vessel contains two non-reacting gases Helium and Neon. The ratio of their partial pressure is 5 : 2. Find the ratio of the number of molecules of helium and Neon.

For the logic circuit shown, the truth table is:

A particle projected from O and moving freely under gravity strikes the horizontal plane passing through O at a distance R from the starting point O as shown in the figure below.

Then which one of the following will be true?

What is the wavelength of a photon emitted during a transition from \(n=5\) state to \(n=2\) state in the hydrogen atom?

A force acting on a body of \(3.0\) kg mass changes its speed from \(2.0\) m/s to \(3.5\) m/s in \(25\) seconds. The direction of motion of the body remains unchanged. What is the magnitude of the force?

The phase difference between the electric field and the magnetic field in the electromagnetic wave is:

\(1 kg\) of water at \(100^{\circ} C\) is converted into steam at \(100^{\circ} C\) by boiling at atmospheric pressure. The volume of water changes from \(1.00 \times 10^{-3} m ^3\) as a liquid to 1. \(671 m ^3\) as steam. The change in internal energy of the system during the process will be (Given latent heat of vaporisation \(=2257 kJ / kg\), Atmospheric pressure \(\left.=1 \times 10^5 Pa \right)\)