Explanation

Explanation

Explanation

The internal energy of an ideal gas is solely dependent on the kinetic energy of the molecules, which is directly related to the temperature. 

Explanation

In an isothermal process, the temperature of the system remains constant throughout.

Since this expansion occurs at a constant temperature, the internal energy is not changed (for an ideal gas, internal energy is dependent only on temperature).

The work done by the gas during expansion is not zero, and as the gas expands, the pressure decreases.

Explanation

In an adiabatic process, when the volume of a gas decreases, the temperature of the gas increases.

• In an adiabatic process, no heat is exchanged with the surroundings.
  
• When the volume decreases, the gas is compressed, and work is done on the gas.
• This work increases the internal energy of the gas, which raises its temperature.

Explanation

When a police car with its siren on moves towards a stationary listener, the frequency of the sound perceived by the listener increases.

This phenomenon is known as the Doppler effect.

Explanation

To find the separation between compression and the adjacent rarefaction of sound waves produced by a tuning fork, we can use the following steps:

Explanation

The speed of sound in an ideal gas is primarily dependent on the temperature of the gas and its molecular weight.

While the density of the gas does influence the speed of sound, it changes with temperature and pressure.

Explanation

According to the principle of superimposition, when 2 or more waves overlap at a point in space, the amplitude of the resultant wave at that point is: The sum of the amplitudes of the individual waves.

Explanation

In longitudinal waves, the particles of the medium move back and forth in the same direction as the wave travels.

This results in compressions and rarefactions within the medium.