Midterm 2013

1 short calculations these are all independent

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Unformatted text preview: one, move on to another. Partial credit will be assigned where appropriate. #1. Short Calculations. [These are all independent of each other.] (a) Suppose we attempt to measure the Hubble constant using a standard candle in a galaxy at a distance D. The galaxy has a random peculiar velocity of ~400 km/s. What is the minimum value of D at which the peculiar velocity introduces no more than 10% error in the Hubble constant? (b) What is the change ΔT in the CMB temperature during the lifetime of a typical astronomer? (c) One uncertainty in the theoreti...
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