Questions 1)Can you explain the purpose of the iron fillings? 2

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Questions 1)Can you explain the purpose of the iron fillings?

2. Is the force constant along a magnetic field line?

3. Do lines of force cross each other? Explain.

4. Why did you point the magnet's South Pole toward earth's north?

5. If you want to store two bar magnets, what orientation should they have with respect to each other so as not to weaken their magnetic fields?