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.
Effective Drinks. Decaffeinated, non-mint herbal tea; non-citrus juices such as apple juice; and plenty of water usually work effectively in a diet to protect you from heartburn. Penn Medicine advises drinking only small amounts of liquid during mealtime to avoid overworking the stomach.
1 When you are purchasing a tea for acid reflux relief, make sure to find an herbal blend or green tea that is caffeine-free. Some teas are chemically decaffeinated, but there are plenty of teas that are naturally caffeine free and are beneficial for heartburn relief.  Avoid mint infused teas.