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
Relation of wavelengths of sound and light is
λS < λL
λS > λL
λS = λL
None of these
B.
λS > λL
Wavelength of sound is greater than that of light λS > λL
Dancing of small pieces of camphor on the surface of water is due to
viscosity
surface tension
weight
lifting force
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