If you and your friend do the same amount of work, but you do it FASTER than they do, YOU are more powerful than they are. True
False

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Select all the correct answers. which three statements about electromagnetic radiation are true?

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places