The diagram here shows a 1-kg aluminum sphere and a 3-kg copper sphere of equal radius located 20 meters above the ground.

which sphere has the greatest potential energy?

the aluminum

the copper

they are the same

not enough information

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

16

explanation:

the marks go by 4s