Read the following selection from the section "Energy Can Change Form."
The ball's kinetic energy is changed
into heat by the opposing force of
friction. Friction is the force resisting
objects sliding against each other.
The ball stops at the bottom of the
hill because friction transforms all its
kinetic energy into heat. As with
energy transfers, the amount of
energy stays the same in
transformations.
Based on this selection, choose the statement
that is TRUE.

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.

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j