11. A slightly disturbed man of 80kg runs directly into a wall with a kinetic energy of 8000J. How fast is he running?

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

The graph below plots the temperature and luminosity of stars on the main sequence.

Explain how earths tilt and revolution around the sun affects weather and climate