By varying the proportions of copper and zinc, the properties of the brass can be changed, allowing hard and soft brasses. The density of brass is approximately .303 lb/cubic inch, 8.4 to 8.73 grams per cubic centimetre.
Milk encourages the production of stomach acid and might promote acid reflux in the middle of the night. Raise the head of your bed four to six inches to avoid heartburn during sleep by using blocks under the bedposts. This raises your upper body. Extra pillows only raise your head.
Vinegar, on the other hand, is acidic, so it is a bit of a surprise that many people find a sip of vinegar either straight or mixed into water is helpful against heartburn discomfort. In this sound clip, a radio show listener reports his experience using apple cider vinegar to alleviate symptoms of heartburn.