Hello, Coin Momma!
Please follow the links to find out the info you're looking for...
*Here is a link to info on your 1879-O Morgan dollar:
http://www.coinvalues.com/morgan-silver-dollar/1879
*Meanwhile, we have information on your 1965 Kennedy half here (the marking on the base of Kennedy's neck are the initials for the coin's designer, Gilroy Roberts):
http://www.coinvalues.com/kennedy-half-dollar/1965
*This is an approximation on what your 1945-D Mercury dime is worth (by the way, the "AW" is an anagram for the coin's designer, Adolph A. Weinman):
http://www.coinvalues.com/mercury-dime/1945
*Your 1971-D Eisenhower dollar is worth $1.05 to $1.10 if it has any wear.
Good luck,
Josh