Carlos does a chin-up in gym class and raises himself 0.8 m. If Carlos has a mass of 62 kg, how much work does he accomplish? If he completes this task in 5 seconds, how much power does he generate? (Remember, mass is not a force!)

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.

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption

real, smaller and upside-down.   so the answer should be b.