THE MECHANICAL UNIVERSE Name:

Video 11 Gravity Electricity and Magnetism Class:

1. Fundamental constants of nature have values (magnitudes) often for reasons that we as a civilization have no good explanation. When constants of nature are shown to be connected the discovery is often described as………

2. Light coming from distant objects, such as stars or galaxies, is measured in what unit?

3. In 1850, the inventor of the gyroscope, Jean Foucault measured the speed of light using what tool?

4. In 1926 Michelson measured the speed of light using a rotating mirror and bouncing light between 2 mountains outside of Los Angeles. What was the magnitude of this “light speed”?

5. A brilliant and modest English scientist measured mass of the entire Earth. What was his name?

6. Can there exist in nature a magnetic “mono”pole? (i.e. just a north or just a south pole)

7. In 1820, Oerstead discovered a link between electric current in a wire and the ______

8. 50 years after Oerstead’s discovery, James Clerk Maxwell showed that the ratio of the electric and magnetic field constants can be used to do what?

9. The telegraph was first invented in 1838 by inventor Samuel Morse. In the 1850’s the transatlantic telegraph cable being laid out. Unfortunately, what happened?