Will give brainliest! if right!
the earpiece of your telephone converts electric signals back into sound waves, so that you can hear the person talking to you on the other end of the phone.

true

false

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.