Yup!
Yes, you do need a stamp wherever you post anything.
The reason you need a stamp to mail a letter is because the stamp is the proof that you paid for your letter to be delivered. Instead of paying the mailman directly, and waiting for him to come to your house so you can pay the mailman to deliver your mail, the stamp proves that you paid for the delivery of the mail.
yes, you pretty much ALWAYS need a stamp to send a letter in the mail. :)
No of course not! you'd need an airmail stamp.
Of course
1, so long as it is a 48 cent stamp assuming you are in the United States
No, you must use local Israeli stamps
6
get an envelope put your mail the mailbox in buy a stamp, and hopefullly it gets where you need it to
You would only need one stamp to mail your letter
you only need one stamp
About 44 cents, last I recalled. You just need the current First class stamp on there. You can pick it up at your local Post Office or Bank.