for a group class project students are building mode roller coasters each roller coaster needs to begin at the top of the first hill where a horizontal spring that is initially compressed .25 m will push a small car forward

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

hope this : )

explanation:

powerful computers now, not then

heats surface water up

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.