A copper block weighing 2 kg is dropped from a height of 20m. What is the rise in the temperature of the copper block after it hits the floor. The specific heat capacity of copper is 400 J/(kgC )

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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.

i don't understand. explain it clearly