Which event occurred at a redshift around 1100?
a. big bang b. inflation
c. CMB d. first stars formed
c
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A typical protostar may be several thousand times more luminous than our Sun. Where does this energy come from?
What will be an ideal response?
A light beam is incident upon a still water surface. What is the maximum possible value for the angle of refraction? (nwater = 1.333)
a. 76.2° b. 67.5° c. 54.4° d. 48.6°
Which of the following reaction energies is the least exothermic (but still an exothermic reaction)?
A) 540 kJ/mole B) -540 kJ/mole C) 125 kJ/mole D) -125 kJ/mole E) not enough information given
Three point charges are positioned as follows: 
is at (0.00 m, 0.00 m), 
is at (1.20 m, 0.00 m), and 
is at (1.20 m, 1.60 m). If all three charges are negative, into which quadrant is the force on 
pointing?
A. 1st B. 2nd C. 3rd D. 4th E. there isn't enough information in the problem to solve this