Other causes of stomach rumbles: 1  Incomplete digestion of food can lead to excess gas in the intestine. 2  Louder rumbles may occur when one is hungry. 3  Stomach rumbles can form further along the gastrointestinal system when air is swallowed while talking, eating, and drinking.
One cup of raw yams contains about 158 calories, whereas 1 cup of raw sweet potatoes contains about 114 calories. Therefore, yams contain about 44 more calories than sweet potatoes for an equal portion.
How many calories in boiled sweet potatoes? Calories in boiled sweet potatoes   There are:   * Approx 22 calories in 1 ounce, or 28g, of boiled sweet potato  * Approx 76 calories in 3Â½, or 100g, of boiled sweeâ¦t potato  * Approx 249 calories in 1 cup (11.6 oz) of mashed, boiled, sweet potato.