Determine the change in velocity of a car that starts at rest and has a final velocity of 20 m/s north

Two vectors are shown. which statement best compares the vectors? vector x has greater magnitude than vector y. vector y has greater magnitude than vector x. the vectors have the same displacement. the vectors have the same direction.

In the first law of thermodynamics, triangle e=q-w, what does q stand for

What are two different ways you could find the value of a? explain these methods.