The volume occupied by the molecules contained in 4.5 kg water at STP, if the intermolecular forces vanish away is
A capacitor of capacitance C = 900 pF is charged fully by 100 V battery B as shown in figure (a). Then it is disconnected from the battery and connected to another uncharged capacitor of capacitance C = 900 pF as shown in figure (b). The electrostatic energy stored by the system (b) is
A wheatstone bridge is used to determine the value of unknown resistance X by adjusting the variable resistance Y as shown in the figure. For the most precise measurement of X, the resistance P and Q
Two transparent media A and B are separated by a plane boundary. The speed of light in those media are 1.5 $$\times$$ 108 m/s and 2.0 $$\times$$ 108 m/s, respectively. The critical angle for a ray of light for these two media is