I WILL PICK BRAINLIEST! Use the concept of energy to explain why ideal mechanical advantage is not the same as mechanical advantage for real machines.

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

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double the distance = divide strength by 4