Vector a with arrow, which is directed along an x axis, is to be added to vector b with arrow, which has a magnitude of 5.5 m. the sum is a third vector that is directed along the y axis, with a magnitude that is 6.0 times that of a with arrow. what is the magnitude of a with arrow? (enter your answer to 4 significant figures.)

20) what is a magnetic field? 21) in which direction do magnetic field lines always point? 22) sketch a diagram showing how a plotting compass points around a 23) name two magnetic poles that will: a) attract each other b) repel each other. 24) explain why you can use a compass to navigate. 25) what's an electromagnet? 26) list two ways to increase the strength of an electromagnet. 27) the wire in a simple motor feels a force when a current flows through it. why is this? i need answers to check mine