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.
The longest a star can live is 10 billion years. The sun will last for about 6 billion, it is almost in its 4th billionth year. The life of stars depend on the size of the star. The larger the star, the shorter the life. A hot supergiant will last millions of years. A cooler yellow dwarf may last billions of years. The coolest star - a red dwarf lasts, well, any created are still burning. The longest a star can live is 10 billion years.