Having established that a sound wave corresponds to pressure fluctuations in the medium, what can you conclude about the direction in which such pressure fluctuations travel?

a) the direction of motion of pressure fluctuations is independent of the direction of motion of the sound wave.
b) pressure fluctuations travel perpendicularly to the direction of propagation of the sound wave.

None of them: the direction of the pressure fluctuations is parallel to the direction of motion of the wave

Explanation:

Depending on their direction of oscillation, waves can be classified into two types:

- Transverse waves: in transverse waves, the vibrations occur in a direction perpendicular to the direction of propagation of the wave. Examples of transverse waves are electromagnetic waves

- Longitudinal waves: in longitudinal waves, the vibrations occur in a direction parallel to the direction of propagation of the wave. Examples of longitudinal waves are sound waves

As we said, sound waves are longitudinal waves, so their vibrations (which correspond to the pressure fluctuations of the medium) occur in a direction parallel to the direction of propagation of the wave.

answer: cesare beccaria developed the classical school of criminology with from philosopher jeremy bentham

explanation:

so here is the information for current research:

-nrel's geothermal analysts, scientists, and engineers perform a full range of research from developing advanced methods of locating and accessing geothermal resources to exploring innovative technologies to extract and produce clean energy from the heat of the earth

and here is the information for the technology of geothermal energy:

-it's clean and sustainable

-resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma

-almost everywhere, the shallow ground or upper 10 feet of the earth's surface maintains a nearly constant temperature between 50° and 60°f (10° and 16°c)

-geothermal heat pumps can tap into this resource to heat and cool buildings

-a geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building

-in the winter, the heat pump removes heat from the heat exchanger and pumps it into the indoor air delivery system

-in the summer, the process is reversed, and the heat pump moves heat from the indoor air into the heat exchanger

-the heat removed from the indoor air during the summer can also be used to provide a free source of hot water