Reference no: EM133210377
Question 1: What is the main difficulty in trying to figure out how gravity works with the other forces? How does this complicate our ability to reconstruct the history of the early universe?
Question 2: What is the Schwarzschild radius of 100 kg person?
Question 3: How could you use spectroscopy (Unit 1) to tell which generation a star belongs to?
Question 4: Look at the Hubble's law graph. The line drawn through each individual dot is called the "error bar" - it represents the uncertainty in the distance to the galaxy represented by that point. What do you notice about the sizes of the error bars in the lower left part of the graph versus the upper right part of the graph? What does this mean? How does this impact our ability to get an accurate slope for the graph (and hence an accurate measurement of the Hubble constant)?
Question 5: Compare Newton's model of cosmology and Einstein's and the problems with each. Comment on what happens when scientists allow their biases to get in the way of their science.
Question 6: Edwin Hubble was miffed that he never received a Nobel Prize. Did Lemaitre have a better reason to be upset? Explain.
Question 7: What would be the chemistry of a universe that had no stars (assuming the laws of physics were the same). Hint - what was our universe like before we had stars?
Question 8: If the universe suddenly became much more massive than it currently is, what would probably happen to its expansion? Why?
Question 9: Why is the name "Grand Unified Theory" sort of misleading?