Physics
The quality or tone of a musical sound produced by a stringed instrument depends on

Length of the strings in the instrument
Amplitude of vibration
Wave form of the sound
Frequency of vibration

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Physics
For an ideal gas, which one of the following statements does not hold true?

The potential energy of the gas molecules is zero
The kinetic energies of all gas molecules are not same
There is no interactive force between the molecules.
The speed of all gas molecules is same

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