Answer:

Explanation:
The difference between top and bottom surfaces is computed by the following hydrostatic equivalence:



40 N. If you’re using F=MA MxA would be 10x4 which would get you 40 N
Hubble noticed that the galaxies were moving away from us, which meant the universe was expanding.
This is why constellations change over time. In some years, the Big Dipper won't actually look like a dipper anymore.