Question

Attachment in comment ! :)

Answer 1

A is crest, D is trough, C is amplitude

Must be rest position.

Answer 2

so what is b?

Answer 3

@DrknoSDN

Answer 4

Rest Position i'd guess. Haven't heard it called that before though.

Answer 5

2 more ? :)

Answer 6

sure

Answer 7

Mechanical waves travel slower in denser material.

Answer 8

Oh wait,

Answer 9

are you sure I think I got it wrong the last time

Answer 10

Mechanical waves travel faster, EM waves travel slower,

Answer 11

So number 11 is the 3rd option. Light travels more slowly in water than it does in air.

Answer 12

thank you <3 your the reason I got a A in science now lol