brett said if a new federal government decided to withdraw the workforce supplement funding after the first year dpg had agreed to fund a 3 % increase in the second and third years of the agreement
A less familiar, and more dangerous trick, is to repeat the process using a very dense gasâsulfur hexafluoride. Just like low-density helium displaces the air and creates a high-pitched voice, sulfur hexaflouride also displaces regular air but creates a very low-pitched voice thanks to its high-density.
Voice pitch decreases tremendously when inhaling SF6 because the speed of sound in SF6 is much less than in air. Sound travels through SF6 at only around 120 m/s, whereas it travels through air at around 340 m/s. Sound travels through helium at around 900 m/s. SF6 is a non-poisonous gas, but should only be inhaled in small quantities (if inhaled at all). It is suggested that one have a tank of pure oxygen gas on hand before demonstrating SF6 inhalation and breathe pure oxygen for about ten breaths before inhaling SF6.