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..
Re: Zenith Cobra record player. by Tony V on Wed May 13, 2015 8:34 pm. I have a few but they don't play well on the cobra because of the size of the stylus tip on the needle. Tip sizes for the cobra were 1 mil for 33's and 45's...2 mil universal for all speeds (but this one didn't work well either) and a 3 mil for 78's.