Please help!!!! 70 points, i really need this! D:
Please please please help.

Jim draws a wave that looks like this

(insert 1st picture)

if he increases the number troughs that pass a point in a given time,what has he decreased?

frequency

intensity

amplitude

wavelength


Laura and Jessica are practicing for the unit test. Their study guide has a picture of these two waves

(insert the 2nd picture, which the answer choices)


Jean is taking a quiz on waves. She is asked to measure the wavelength of a longitudinal wave. What should she do?

measure from rarefaction to rarefaction

measure from rarefaction to compression

measure from crest to crest

measure from trough to trough


Hakeem says that the speed of a sound wave depends mostly on the amplitude of the wave, but grant disagrees and says it has to do with the wave length. Who is correct and why?

(insert the last picture with the answer choices)


Thank you if anyone helps :)