Depending on how well youâve kept up with fire extinguisher maintenance, your portable fire extinguisher should last, essentially, forever. If youâve had the same fire extinguisher for a long time (10-12 years),one way to test its condition ) is to have it hydrostatically tested. A hydrostatic test exposes your fire extinguisher to high pressure (usually 500psi) to check the integrity of the shell.
Jingle Bells was the first song broadcast from space, in a Christmas-themed prank by Gemini 6 astronauts Tom Stafford and Wally Schirra. While in space on December 16, 1965, they sent this report to Mission Control : Gemini VII, this is Gemini VI.
1 The very first transmission of music by radio is credited to one Dr. Nussbaumer of the University of Graz in 1904, however it was not to the general public. 2  He yodeled an Austrian folk song into an experimental transmitter which was received in the next room at the university where he worked.