A group of students is setting up a test to see whether earthworms, like those shown in the photo, pref er rough or
smooth surfaces.
Which type of investigation is the group doing?
A. Descriptive
B. Controlled
C. Experimental
D. Comparative

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

6 cos 34, 6 sin 34 trig

resonant frequency

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )