Pls answer

a longitudinal wave is

a wave that the medium is displaced perpendicular to the direction of the wave, such as a sound wave in the air.

a wave that the medium is displaced parallel to the direction of the wave, such as waves on a string.

a wave that the medium is displaced perpendicular to the direction of the wave, such as waves on a string.

a wave that the medium is displaced parallel to the direction of the wave, such as a sound wave in the air

A Longitudinal Wave is _____.

D.a wave that the medium is displaced parallel to the direction of the wave, such as a sound wave in the air

Explanation:

Sound : It is the mechanical energy that causes sensation of hearing to the ear.

Sound is produce by the vibrating objects .

Vibration : To and fro motion of the object.

The vibrating motion of particle creates two region of air pressure:

Hence , Sound wave travels by forming compression and rarefaction.

This disturbance in particles of air  is called : Wave

The waves are classified into two parts :

1. Longitudinal wave : These are those waves in which particles of medium travel parallel to the propagation of the wave.They both travel in same direction.

Sound wave is longitudinal wave

2. transverse wave : These are those wave in which particle of medium travel perpendicular to the direction of wave . If particles travel along x-axis then wave along y or z- axis.

example : Light (or electromagnetic wave) is transverse wave

Look at the attached images :

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.