An image is placed in front of an unknown lens. The magnification of the image is +0.5. What is the type of the lens used?

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.

the right answer is 0.3 meters per second