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.
Hi. The life span is dependent solely on the mass of the star. The more mass the shorter the life span. A normal star like the sun has about a 10 billion year life span. A smaller star will burn (fuse) more slowly while a more massive star will burn (fuse) much more rapidly.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.