Named after the constellation they appear to radiate

A beam of light (f = 5 × 1014 Hz) enters a piece of glass (n = 1.5). What is the frequency of the light while it is in the glass?

A) 5 × 1014 Hz B) 7.5 × 1014 Hz C) 3.33 × 1014 Hz D) 5 × 1013 Hz E) 7.5 × 1013 Hz

Based on evidence from measurements of the acceleration of the expansion rate and from careful study of the cosmic microwave background, about what percentage of the universe's total mass and energy takes the form of ordinary atomic matter (protons, neutrons, and electrons)?

A) 5% B) 0.5% C) 27% D) 68%

When boarding an airplane you bring a bag of chips. While in flight the bag puffs up, because

A) air pressure in the air-tight bag is greater than cabin air pressure. B) suction is occurring. C) air pressure is affected by the Bernoulli principle. D) all the above E) none of the above

In a crystalline metal at low temperature, the magnitude of the plastic strain is equal to the mobile dislocation density times the Burger’s vector times the average _____________moved by the dislocations.

Fill in the blank(s) with the appropriate word(s).