Self-certification. Employers can also ask employees to fill in a form when they return to work to confirm theyâve been off sick for up to 7 days. This is called âself-certificationâ. Employers usually provide their own version of this form.elf-certification. Employers can also ask employees to fill in a form when they return to work to confirm theyâve been off sick for up to 7 days. This is called âself-certificationâ. Employers usually provide their own version of this form.
Â· just now. 1  The most massive stars (OB stars) have the shortest life. K and M stars are the least massive and have the longest lives. 2  McGarnigle is the most correct here. Type O and B are the hottest, most massive stars and, by virtue of their extreme mass, are the shortest lived.
All the first 4 answers are correct. Unlike a bonfire, and contrary to intuition, the bigger a star, the shorter the life. In the case of a red dwarf, the star may glow for as long as 10^14 years.That's 10 000 times the present age of the universe. A brown dwarf will be warmer than the background radiation in space for even longer. Right now the background radiation temperature is 2.7K.ll the first 4 answers are correct. Unlike a bonfire, and contrary to intuition, the bigger a star, the shorter the life. In the case of a red dwarf, the star may glow for as long as 10^14 years.