Normal or 'traditional' reservists are the most common kind of reservist. They have 'drill weekends' one weekend of every month, and in addition they have to serve for two weeks every year. Their work is focused on training and staying ready to fly/fight in case they're ever needed to deploy.
DONG Energy (former names: Dansk Naturgas and Dansk Olie og Naturgas (abbreviated as DONG)) is an integrated energy company based in Fredericia, Denmark. It is Denmark's largest energy company.
This stored energy is called potential energy. Since it is energy in a gravitational field, it is called gravitational potential energy or potential energy due to gravity. The symbol for potential energy, in general, is U, and the symbol for gravitational potential energy is U g.