What is the origin of the terms “a. m.” and “p. m.” in our timekeeping?

Answer and Explanation:

The a.m and p.m are Latin words a.m means ante meridian meridian means mid day and ante means before so a.m means before mid day p.m is also an Latin word in which p stands for post and meridian stands for the mid day so p.m means post mid day. The origin of a.m and p.m is Latin word for example 6 a.m means 6 'o' clock in morning and 6 p,m means 6 'o' clock in evening  

he . if i may ask what i your question exactly?

explanation:

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.