Anyone doing physics in apex, can you please help me? I'm doing a lab but I don't have the materials for it. I already emailed my teacher and he said to to the dry lab version but that one looks like it needs materials too that I don't have. how do you do this?

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

ammonium chloride & tallow

radiation warms things up temp rises convection currents air circ windy weather

there are no contact forces mentioned on the list of choices that you've provided.