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.
* Peptic ulcers. * Smoking cigarettes. * Drinking carbonated beverages. * Consuming fatty or spicy food, citrus fruits, tomato products, onions and chocolate. * Gastritis. * Taking medications including ibuprofen, aspirin, and certain drugs used to treat hypertension.
Food and drinks that commonly trigger heartburn include: 1  Alcohol, particularly red wine. 2  Black pepper, garlic, raw onions and other spicy foods. 3  Chocolate. Citrus fruits and products, such as oranges and orange juice.  Coffee and caffeinated drinks including tea and 1  cola. Peppermint.  Tomatoes.