Pushing on the pump of a bottle of hand washing solution compresses a small spring which obeys hooke's law. if the potential energy of the spring is 0.0030 j when the spring is compressed 0.47 cm, determine the following.
(a) force constant of the spring

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.