Which of these reactions is responsible for energy radiating from stars, including the sun?
a)
nuclear fusion
nuclear fission
an exothermic chemical reaction
an endothermic chemical reaction
3

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2