John wants his secret clubhouse to have a wall covered with a material that will allow him to see people approaching from around a corner. What kind of material would be best to use? 1. Material that is translucent 2. Material that is reflective 3. Material that is transparent 4. Material that is opaque

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