Vibrations and waves questions | form five Physics

A cyslist and a railway train are approaching each other with a speed of 10ms^-1 and 20ms^-1 respectively. If the engine driver sounds a warning siren at a frequency of 480Hz, calculate the frequency of the note heard by the cyclist;

1. Before the train has passed
2. After the train has passed.

Answer / Solution

UNSOLVED

1. The equation represents a plane wave travelling in a medium along the x-direction , y being the displacement at the point x at time t. Deduce whether the wave is travelling in hte positive x-direction or the negative x-direction.
2. If , , ; determine the speed of the wave.

Answer / Solution

UNSOLVED

Briefly explain why diffraction is common in sound but not in light.

Answer / Solution

UNSOLVED

A 40cm long wire is in unison with a tuning fork of frequency 256Hz, when stretched by a load of density 9g m^-3 hanging vertically. The load is then immersed in water. By how much the length of the wire should be reduced to bring it again in unison with the same tuning fork.

Answer / Solution

UNSOLVED

Define the following terms;

1. Intensity of sound
2. Beats
3. Ultrasonic
4. Overtones

Answer / Solution

UNSOLVED