It basically means a break. So you took a thirty-minute break from your exam. Hope this helps!
Joules, kilojoules and megajoules are used to express the amount of energy absorbed or released during a chemical reaction. Think of it this way:
In foods, on the label at the back, there is the amount of kilojoules per xxx grams...
And food is classified as chemical energy, right?
Same concept for other types of energy.
Their hearts have not grown old;
Passion or conquest, wander where they will,
Attend upon them still. I would say that this section of the poem indicate that the swans represent eternity ie saying that their hearts have not grown old and that they still have passion and a will for conquest indicates at least for now eternal qualities that they possess,
