A spelunker is exploring a cave and follows a passage 18 m west, then 21 m 50° north of east, then 28 m 30° south of east. Determine the resultant vector to establish the distance and direction she is from the starting point. (Draw the vector diagram at scale).

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.

it would stay the same