A hollow prism is filled with water and placed in air. It will deviate the incident rays
The number of possible natural oscillations of air column in a pipe closed at one end of length $$85 \mathrm{~cm}$$ whose frequencies lie below $$1250 \mathrm{~Hz}$$ are (velocity of sound $$=340 \mathrm{~ms}^{-1}$$)
The figure shows a network of five capacitors connected to a 20 V battery. Calculate the charge acquired by each 10 $$\mu$$F capacitor.
What is the relation obeyed by the angles of contact $$\theta_1, \theta_2$$ and $$\theta_3$$ of 3 liquids of different densities $$P_1, P_2$$ and $$P_3$$ respectively $$(\mathrm{P}_1 < \mathrm{P}_2 < \mathrm{P}_3$$) when they rise to the same capillary height in 3 identical capillaries and having nearly same surface tension $$\mathrm{T}$$ ?