According to our textbook, we now have over __ billion people living on our planet

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?