Two vectors a and b have components (0,1) and (-1,3), respectively. what is magnitude of the sum of these two vectors?

a) 3.2
b) 4.1
c) 3.9
d) 2.8

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?

How to tell if a molecule is polar or nonpolar with electronegativity