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..
Bell AH-1 Cobra: Bell AH-1 Cobra is another very advanced helicopter which is made with the single engine and the product of famous helicopter company called Bell helicopters. It is made with latest rotor system and transmission in it. It is considered as the backbone of the USA army because it is quite an advance one.