The maximum dimensions for your carry-on bag are: Length - 24 (61cm) including wheels and handles ; Width - 17 (43cm) Height - 10 (25cm) For additional carry-on items beyond the one-bag limit, each piece will incur a fee. Refer to the checked baggage page for more information.
Tritium (3H) is the most stable radioisotope of hydrogen. That is, of all radioactive isotopes of hydrogen, tritium is the least radioactive. It has a proton and 2 neutrons in its nucleus. Tritium decays through beta minus decay and changes to helium-3. It has a half-life of 12.32 years.
As far as we can tell, protons are stable. Experiments designed to look for proton decay have not seen any, indicating that even if they are not actually stable, protons have a half-life of at least 6.6x1033 years.(For comparison, the accepted figure for the current age of the universe is about 1.3x109 years.).ome theories predict that protons decay with a half-life of about 1036 years, and experimental evidence so far available has not utterly ruled this out.