Depends on the weight of the letter. For an ordinary letter, one first class stamp will do. Weight, not distance.
One-if its not over weight.
Postage is based on weight, not distance. A one ounce letter is one stamp.
One normal Canadian stamp (for a letter size and weight)
One, or depending on the weight, more. It depends on the weight and size of the letter. However for just a normal A4 letter, one stamp should be sufficient. If you are unsure, you can always check at your local Post Office.
Enough to cover the weight of the letter. One first class stamp will mail a one ounce envelope.
If it is a regular size letter and weight that is one stamp.
If you go to the United States Postal Service web-stie, you will find that one US First class stamp ($0.42) will cover the cost to mail a letter that weighs up to 1 ounce, about 28.35 grams. Thus, the average weight of a letter is one ounce or less.
The "gh" in "weight" is a silent letter. It is not pronounced when saying the word.
Postage is a function of weight not distance. You need to have your letter weighed to be certain, but the average letter would be one stamp.
No, a letter of recommendation from a family friend may not hold as much weight as one from a professional or academic contact.
44 cents pays for up to a one ounce letter.