What was the surface area in cm2 that the main beam covered when the flashlight was held at a 90°angle?

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

explanation:

newton's third law, for every action there is an equal and opposite reaction.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.