What is acceleration due to gravity constant

9.8 m/s/s

A free-falling object has an acceleration of 9.8 m/s/s, downward (on Earth).

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the amount of current in the coil

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.