Weight loss. If your cat is overweight, you will want to feed for 2 pounds less, or 40 fewer calories a day, and readjust every time your cat loses a pound, until you hit a healthy weight, and then maintain.  Differences in metabolism.
Since the speed of sound through the standard atmosphere is 761 mph (1,223 km/h) at sea level, Mach 2 then follows as 1,522 mph (2,447 km/h). If you were to ask how fast is Mach 2 at an altitude of 30,000 ft (9,150 m), we would use the same methodology to find out that it is only 1,356 mph (2,180 km/h) because the speed of sound generally decreases as altitude increases.
It is called Mach 1. Mach numbers are given to fast airplane speeds rather than miles per hour. They indicate the ratio of the speed of sound to the speed of the plane. Mach 2 is twice, and Mach 3 is three times the speed of sound. Through ordinary air, the speed of sound is about one mile in five seconds, but it varies with temperature. < Prev.