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Where it can be easily seen by the operator and as far away from any magnetic materials or strong electrical currents as possible
A boy's compass should be securely attached to his person, such as on a backpack strap or a belt loop, for easy access and use while hiking or navigating outdoors. It should be kept away from any electronic devices or metal objects that could interfere with its accuracy.
You can clean the aluminum particles by dusting them away.
Far away from what? A compass? A GPS? What are you asking for?
If you point the north side of the compass away from you the compass will point south. Because the needle always points north (magnetism).
anywhere where you could throw away aluminum cans
stay away from all products or foods containing aluminum
Iron or steel. Since it is a magnet, a compass will point to iron instead of pointing North.
My aluminum awnings blew away in a thunderstorm. Where can I buy new ones?
Iron
Old style steel ("tin") cans were, but modern aluminum cans, no. Steel eventually rusts away, but the oxides of aluminum are more durable than aluminum itself (in fact, they're used as abrasives, to wear away other stuff). On the other hand, recycling aluminum can is twenty times as efficient as extracting aluminum from bauxite ore.
Old style steel ("tin") cans were, but modern aluminum cans, no. Steel eventually rusts away, but the oxides of aluminum are more durable than aluminum itself (in fact, they're used as abrasives, to wear away other stuff). On the other hand, recycling aluminum can is twenty times as efficient as extracting aluminum from bauxite ore.