Sometimes, the Microsoft Outlook integration is successful but you might not see the users' presence status/presence bubble in Microsoft Outlook. In order to troubleshoot this problem, verify these points:
2. Half-life is the time taken for the count rate to fall to half of its original reading. There are a number of ways to define half-life. Remember one of the above definitions, it may be useful in the exams. An Explanation of Half-life. A radioactive material will have some nuclei that are stable and some that are unstable.
Half life is the period of time for half of something to be eliminated or transformed by some process. The term is used in many fields: 1  nuclear physics: period of time for half of a radioisotope to decay. 2  medicine: period of time for half of a drug to be eliminated by metabolism and/or excretion.