Direct legacy logins to https://elearning.theimi.org.uk/ will cease on 07/10/2020. After this date, course login will only be available through My IMI accounts. Should you have an old account
which needs upgrading, please contact the eLearning team on email@example.com.
The ratio of the density of one substance to the density of water. Used to measure battery acid strength. Specific gravity is a similar but older term.