Quelle est LA diferance entre les particules du gaz et du particules solides ​

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Which of these is the best way to manage a natural resource