what do i do if i just found out my boy friend is flirting with another girl and cheating on me and we are in a long-distance relationship and we can only talk on here

What happens to isotopes that are unstable?

Which material burns faster? metal aluminum

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?