Astrophysicists believe the dominant hot spots in the cosmic background radiation should be about 1° in angular size if the universe is flat. What do experimental measurements of this angular size tell us?

Astrophysicists believe the dominant hot spots in the cosmic background radiation should be about 1° in angular size if the universe is flat. What do experimental measurements of this angular size

Explanation:

In a flat universe, Euclidean geometry applies at the very largest scales. This means parallel lines will never meet, and the internal angles of a triangle always add up to exactly 180 degrees—just like you're used to. But in curved universes, whether finite or infinite, things get weird

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.

b. a lightning bug, plug of grass, and a worm