Take note that the question is looking for specific latent heat of vaporisation during boiling. Hence information of mass m1 before heating is not relevant. There is no change of state of the water, it is merely the heating of the water (which involves specific heat capacity of water). Solutions: Option D Refer to the worked solution below .

Pitch of the sound depends on the frequency [Higher frequency -> Higher pitch] Loudness of the sound depends on the amplitude [Higher amplitude (energy) ->Louder sound]

When there is an alternative low resistance path for the current to flow through, the current will by pass the other path that has a resistance load (e.g. resistor or bulbs). This is called a 'short circuit' and usually the current will be higher.