1. What was discovered that provides evidence of a cause-and-effect relationship between the
number of wire coils on an electromagnet and magnetic fields?
2.
Using the data you collected, predict how many paper clips the nail could pick up if 400 cm
of wire is wrapped around the nail
3.
What other questions would you like to investigate now that you have examined your data
about objects interacting through the electric and magnetic forces? *Have some fun and try
to test these on your own!

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

pretty sure it's false

the answer is 12 as i may remember

: )