While air can be compressed more easily than water, freely flowing air acts much like waterâat least at relatively low speeds. So when you squeeze a stream of air, two things happen. The air speeds up, and as it speeds up, its pressureâthe force of the air pressing against the side of the objectâgoes down. When the air slows back down, its pressure goes back up. Why does the air speed up? Because of conservation of mass, which states that mass is neither created nor destroyed, no matter what physical changes may take place.
Calories per serving of Macaroni and Ground Beef Goulash. 146 calories of Ground beef, extra lean (15% fat) pan broiled, (2 oz) 49 calories of Macaroni, enriched, (0.25 cup elbow shaped) 23 calories of Ketchup, Heinz, (1.13 tbsp) 22 calories of Yellow Sweet Corn, Canned, (0.13 can (12 oz) yields)
The fat and calorie counts of ground beef differ based on the fat content. For example, 3 ounces of 80 precent lean ground beef has about 210 calories, while the same size portion of 85 percent lean has about 170. A serving of 90 percent lean ground beef has about 145 calories. Try a beef stir-fry or sautÃ©.