Which event occurred at a redshift around 1100?

a. big bang b. inflation
c. CMB d. first stars formed


c

Physics & Space Science

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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?

Physics & Space Science

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°

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science