A rotating disc contains a set of holes in a circle. An air jet is directed onto the holes and a note of frequency 480 Hz is produced. If the number of holes is 20, calculate the speed of rotation of the disc.

Similar Questions

Thermal energy added or removed from a substance that changes the state of the substance is called ...

Electrical power is transmitted at a high voltage rather than low voltage because the amount of ener...

A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that ...

A vector quantity can only be completely described when ……… and …………are mentioned....

J.J. Thomson’s model of the atom was abandoned because ...

Lenz's law of electromagnet states that ...

Which of the following statements about wave is not correct? i. A wavefront is a line which conta...

Electric motor primarily converts ...

The diagram above shows a solid figure with base PQ and center of gravity G on a inclined plane. Whi...

In order to view the sun, the most suitable instrument to use is? ...