Do u think that the role of culture gender and or race has changed in science between the the times we are learning about and today's times, if so how ? If not explain your thoughts?

pe = weightxheight = 2000x1000=2,000,000joules

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.