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
  Speed of sound c in air at the temperature 0f 20 degrees Celsius or 68 degrees Fahrenheit is 343 meters per second.   Scroll down to related links and look at Speed â¦ of sound-temperature matters, not air pressure. 4 people found this useful.