The pH of the water is not a measure of the strength of the acidic or basic solution and alone does not provide a full picture of the characteristics or limitations with the water supply. In general, a water with a low pH (< 6.5) could be acidic, soft, and corrosive.
Price of a Stamp. The current price of a first class stamp is 49 cents. A domestic first class letter (1 oz.) is 49 cents. The price of each additional ounce is 21 cents. It will cost you 34 cents to send a domestic postcard.
Comments (7). The United States Postal Service increased its rates for first class postage and related services (like insurance) on Jan. 27, 2013. The price of a first class Forever stamp increased to 46 cents from 45 cents.Typical costs: The cost to mail a first class letter is 46 cents for up to one ounce, and each additional ounce adds 20 cents. 2  Large envelopes (flats) that are rectangular and not too rigid or thick are 90 cents for up to one ounce (and 20 cents for each additional ounce). 3  Expect to pay 33 cents to mail a postcard.