Equation of a progressive sound wave is y = a sin where x in (metre), t (second), then frequency of wave is
200 Hz
400 Hz
500 Hz
600 Hz
Dancing of small pieces of camphor on the surface of water is due to
viscosity
surface tension
weight
lifting force
B.
surface tension
A camphor particle (about 1 mm cube) 'dances' and moves on water surface. This is due to surface tension differential. This decreases the surface tension of water around the camphor particle. So water moves from the region of high surface tension to the region of low surface tension.
Potential energy of a particle at a distance x from mean position, which is executing simple harmonic motion
zero
The amount of heat required to change 1 g (0°C) of ice into water of 100°C, is
716 cal
500 cal
180 cal
100 cal