If a represents a vector two units in length directed due west, b represents a vector three units in length directed due north and a+b=c-d and 2b-a=c+d.
find the magnitudes and directions ofc and d.

Step-by-step explanation:

Given

Vector A has two units in length due to west i.e.

Vector B has one unit in length due to North i.e.

Also

i.e.

also

i.e.

From 1 and 2

answer: the sun

explanation:

water cycle describes the evaporation of water from earth's surface, formation of clouds and precipitation water back onto the surface of earth. seventy percent of the earth is covered with water in the form of seas and oceans. the heat of the sun causes the evaporation of water from the surface of the ocean. the water vapors rise and condense to form water droplets. the collection of these water droplets form clouds which rain down again.

the evaporation of the oceans surface water as part of the water cycle is caused by the sun