Nome Measuring Liquid Volume
Idently the volume indicated on each graduated cylinder. The unit of volume is ml.
30
20
4
80
5
25
2
25
20
15
10
2
5.
8.
10
30
20
10
40
3.
4

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.

'b ' is the correct conclusion.

I’m not sure about this question

Answerthe number of protons in an atom is its atomic number