An object of mass 100g placed at 10cm mark
on a uniform rule
makes the rule
settle horizontally on a fulcrum
Placed at the 35.cm mark.
Determine the
mass of the wood

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.

Assuming you're referring to significant figures, none of these answer choices are shown to be zero as significant digits. did you, by chance, forget to add something?

Ceardrum passes to the cichela which then send it tovthe auditory nerve until youvhear it fullu

Dutch and london dry are both examples of gin