how many half-lives have elapsed to yield a sample with 125 atoms of c-14 (parent isotope) and 375 atoms of n-14 (daughter isotope)

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.

spare some change and give it to the poor

explanation:

plz : ((

so easy. just google the electromagnetic waves and it’ll pop up.

i think its c if i'm wrong