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My hypothesis was correct that the third electromagnet would pick up the most paperclips because it had the most copper wire wrapped around it. The results might have looked different if the copper wire was wrapped more tightly around the bolts, and if I used iron instead of steel  bolts. It would be interesting to see a different outcome if I used different sized bolts.

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The first electromagnet picked up 8 out of 15 paperclips in all three trials.
The second electromagnet also picked up 8 out of 15 paperclips in all three trials.
The third electromagnet picked up 14 out of 15 paperclips in all three trials.

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The third electromagnet picked up the most paperclips.
The first and second electromagnets picked up the same amount of paperclips.

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The third electromagnet had three bolts and in trial one the electromagnet picked up 7 out of 15 paperclips, and in trial two the electromagnet picked up 3 out of 15 paperclips, and in trial three the electromagnet picked up 4 out of 15 paperclips.

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The second electromagnet had two bolts and in trial one it picked up 4 out of 15 paperclips, in the second trial it picked up 1 out of 15 paperclips, in the third trial it picked 3 paperclips.

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The first electromagnet had one bolt and in trial one it picked up 5 out of 15 paperclips.on the second trial the electromagnet picked up 3 out of 15 paperclips, and in the last trial the electromagnet picked up 0 out of 15 paperclips.

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1. Gather copper wire, steel or iron bolts, a AA battery and electrical tape

2. Wrap the copper wire tightly around the bolt, (leave excess copper wire on both ends to attach to the battery).

3. Attach one end of the copper wire to the positive and the other to the negative.

4. Secure with electric tape.

5. Now you’re done.

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What I chose to change was the amount of bolts for each electromagnet.

The items I chose to stay the same are:

The type of battery.

The type of copper wire.

The type of electrical tape

The same type of paper clips

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6 Steel or Iron bolts.

10 feet of Insulated Copper Wire.

45 Steel Paperclips.

3 AA Batteries.

1 roll of Electrical Tape.

Lots of Talent.

8 Nails (any metal)

2 Plywood Two by Fours (in feet).

2 one foot wooden cylinders.

* 1 six in by one ft wooden rectangle

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At What Amount Of Bolts Is An Electromagnet At It's Top Strength

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It's a magnet that is powered by electricity

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I think the electromagnet with three bolts will attract more paperclips than the others.