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
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
C.
180 cal
Heat required to convert 0°C of ice in water = ml (L = latent heat)
Now, heat required to rise the temperature of water from 0°C to 100°C.
= msΔt
where s = specific heat, Δt = temperature difference.
Total heat = mL + msΔt
= 1 × 80 + 1 × 1 × (100 − 0)
= 180 cal