Quick Answer. Cardiopulmonary resuscitation, or CPR, courses are two to five hours long and the certification lasts for two years, states American Red Cross. CPR is an emergency technique used to attempt to save a personâs life if he has stopped breathing or if his heart has stopped beating, says Mayo Clinic. Continue Reading.
This feature is not available right now. Please try again later. In 1950, Zenith introduced the Cobra-Matic variable speed automatic record changer -- the first and only changer that plays any speed record now made or yet to come, 10 rpm to 85...with two simple controls a six-year-old can operate..
The first automatic transmission using hydraulic fluid may have been developed in 1932 by two Brazilian engineers, Jose JosÃ© Braz araripe And Fernando Lehly; lemos subsequently the prototype and plans were sold To General motors who introduced it in the 1940 oldsmobile as The-Hydra matic. transmissionlso note that as with most American automatic transmissions, selecting 2 using the selection lever will not tell the transmission to be in only 2nd gear; rather, it will simply limit the transmission to 2nd gear after prolonging the duration of 1st gear through higher speeds than normal operation.