If the cable isn't in excellent physical shape, its data carrying capability goes down and your Internet speed will suffer. The same rule applies to its connectors and to the cable in Comcast's system as well.
Sugar is a source of carbohydrate and energy. It provides 4 calories per gram or 16 calories in a level teaspoon (4 g). This compares to 36 calories for the same amount (4 g) of fat or oil (e.g., butter, margarine, canola oil). On its own, sugar has no other nutrients.
If you are on a standard 2,000-calorie diet, this means that you should be eating no more than 500 calories from sugar, or 125 grams. Like all carbohydrates, sugar contains 4 calories per gram. The USDA recommendations are lower than the IOM's.