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.
Steer clear of these if youâre prone to heartburn 1  : Pain relievers. 2  They can ease your headache, but one side effect of taking nonsteroidal anti-inflammatory drugs such as aspirin and ibuprofen is heartburn. 3  Skinny jeans.