The Pitch of a sound depends upon the speed of the vibrations causing it. This is called the frequency. The frequency of a sound is measured in Hertz (Hz) after the German sci â¦ entist Heinrich Rudolf Hertz(1857-1894)  1 Hertz = 1 Vibration Per Second. 3 people found this useful.
Police declared Simpson a fugitive, and hours later, the infamous low-speed chase began. Approximately 6:45 p.m. on June 17, 1994, police saw Simpson on the expressway in a white Ford Bronco driven by his best friend and former teammate, Al Cowlings. Simpson was riding in the back, and he reportedly had a gun. With the cavalcade of police cars in pursuit, TV helicopters swooped in to join the chase.
âThe People v. O.J. Simpsonâ offers some insights that the news coverage of the day didnât, including that the white Bronco that took Simpson all over Los Angeles wasnât actually his Bronco â or the same white Bronco found parked outside Simpsonâs house on the night of the murders, blood caked here and there.