Hydrogen gas is very flammable and yields explosive mixtures with air and oxygen. The explosion of the mixture of hydrogen and oxygen is quite loud. Tests should be made prior to the demonstration to adjust the total volume in the balloons so that the sound of the explosion is tolerable in the room.
How long does cooked beef stew last in the freezer? Properly stored, it will maintain best quality for about 4 to 6 months, but will remain safe beyond that time. The freezer time shown is for best quality only - cooked beef stew that has been kept constantly frozen at 0â will keep safe indefinitely.
Basically meat can be kept frozen for about 3 months ( depending on your freezer). After that it will not spoil but will start to lose it's taste and nutritional values. Turkeys 6 months ,beef 3 to 4 months ,if you get a vacuum seal machine a lot longer your meat will last , and you can add to the meat seasons.