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 had the highest limiting Mach number of any aircraft at that time, and was chosen to take part high speed diving trials. During these trials one aircraft reached 606 mph (975 km/h, Mach 0.891) in a 45Â° dive. In April 1944, the same aircraft reached Mach 0.92, the fastest ever recorded in a piston-engined aircraft. The catch is that the stresses of the dive caused quite a bit of damage, with the propeller separating from the aircraft.