Which force best represents fg?

a)a weight lifter is pushing a barbell upward with a force of 90 n.

b)the weight of a barbell acting on a weight lifter is 80 n.

c)the amount of upward force of a table on a box is 25 n.

d)a box on a rough table has difficulty sliding past 25 n of force.

Listed following are various physical situations that describe how light interacts with matter. match these to the appropriate category. 1) transmission? -visible light meets clear glass -visible light does not pass through a black wall -red light hits a red sweatshirt -light comes from your computer screen -cell phone signals pass through walls -blue light hits a red sweatshirt -white light hits a white piece of paper -light comes from a light bulb