A rubber band has a spring constant of 15 N/m. If you stretch it by 0.3 m,
what is the magnitude of the force that resists the stretching?
O
A. 6.2 N
B. 4.5N
O C. 5.0 N
O D. 3.0N

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