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
Value of - 40°C in Fahrenheit scale is
- 40F
32 F
- 32 F
40°C
A.
- 40F
For - 40°, centrigrade scale and Fahrenheit scale are equal.
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