Which of the following is an example of a safe laboratory produced? a) eating or drinking from laboratory glasware b) tying back long hair and lose clothing c) testing an odor by directly inhaling the vapor d) touching hot objects with your bare hands

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.