A spherical balloon of volume 4.00 x 10 -3 m contains helium at a pressure
of 1.20 x105 Pa. How many moles of helium are in the balloon if the average
kinetic energy of the helium atoms is 3.60 x 10-22 J?

+10 that is always the common denominator

Iwould say earthquakes.

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.

Ibelieve you go to settings