3. An experiment was conducted to determine how various drop heights of ball bearings affects the diameter of the indentation. The ball bearings were 5 cm in
diameter and dropped into 250 grams of sand. The sand was contained in a pie
tin 25 cm across. Students measured the width (cm) of the crater caused by the
ball bearings falling into the sand. The height of the ball bearings was increased
by 10 cm cach time.

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet