A Mercury-bound spacecraft launched from Earth must travel over 91 million kilometres (57 million miles) into the Sun's gravitational potential well. Mercury has an orbital speed of 48 km/s (30 mi/s), whereas Earth's orbital speed is 30 km/s (19 mi/s).
The interior of a raw hamburger usually does contain bacteria, and is safest if cooked well done.. Because E. coli is killed at 155 degrees Fahrenheit, the USDA sets the minimum safe temperature for ground beef at 160 degrees Fahrenheit.
Method (Serves 4) 1  Preheat the grill for 5 minutes. 2  In a medium bowl, use your hands to mix together the mince, Worcestershire sauce, black pepper, garlic salt and onion until the ingredients are evenly distributed. Shape the mixture into hamburger patties. 3  Place the hamburgers on the grill and cook for 7-8 minutes, or until cooked.