The gravitational field on Earth varies not only with latitude, but also with altitude and in other ways, particularly due to crustal thickness and the fact that the Earth's crust effectively floats ...

pre-reqs: trig Think of the following two things. Temperature and wind speed. These are two different things that you could measure, but there is one big difference. Wind speed has two parts to it - ...

Notice how the quantities above have both a size and a direction associated with them. The direction of a vector can be given in a written description, or drawn as an arrow. The length of an arrow ...