Obstruction in the urinary tract. Anything that slows the flow of urine or reduces your ability to completely empty your bladder when urinating, such as a kidney stone, structural abnormalities in your urinary system or, in men, an enlarged prostate gland, can increase your risk of kidney infection.
Quick Answer. The speed of sound, known as Mach 1, varies depending on the medium through which a sound wave propagates. In dry, sea level air that is around 25 degrees Celsius, Mach 1 is equal to 340.29 meters per second, or 1,122.96 feet per second. Continue Reading
1 The speed of sound in air is approximately 330 m/s (about 1,200 kph or 700 mph). 2  The speed of sound in air is nearly the same for all frequencies and amplitudes. 3  It increases with temperature.  Determining the Distance to a Lightning Bolt: Sound waves take approximately 5 seconds to travel 1 mile.