Gravity follows an inverse square law. This means that if the distance between two masses is decreased by a factor of 4, the gravitational force between those two masses

Which of the following was the first strong evidence for an asteroid impact being the cause of the extinction of the dinosaurs 65 million years ago (as well as 75% of all species alive at the time)?

You observe the same spectral line in two stars that are identical in every way except that one rotates faster than the other. How does the spectral line differ between the two?

According to the nebular theory, what are the comets and asteroids?

With current technology, the Doppler method can be used to measure stellar motions that are as small as about

If an interstellar gas cloud shrinks in size, what does the law of conservation of angular momentum predict it will do?

What evidence leads astronomers to conclude that most of the Milky Way’s mass consists of a mysterious dark matter?

Photons behave like

The ecliptic plane is

Answer this question in your scratch paper provided by the instructor. Please clearly number this problem in your scratch paper. Leave this question blank and submit your booklet with answers with your name to the instructor. Identify the configuration below and fill in the configuration prefix in the name below. Next draw the enantiomer and fill in the configuration prefix in the name below the enantiomer.  Grading Rubric: 2 points for both configuration prefixes 2 points for correct enantiomer drawing – be sure to clearly show groups in the plane, wedges and dashes. R-amphetamine has been used for effective treatment of nasal congestion and among other neuro conditions. However, the S stereoisomer, methamphetamine, is commonly known as “meth” and illegal without a prescription. It can cause irregular and/or rapid heartbeat, delirium, and psychosis.  amphetamine.jpg