If You Found a Galaxy with a Hydrogen Emission Line,normally

question 21

Multiple Choice

If you found a galaxy with a hydrogen emission line,normally found at 656.3 nm,with a measured wavelength of 756.3 nm,what would the galaxy's recessional velocity be if the Hubble constant is 72 km/s/Mpc?

• A) 39,700 km/s
• B) 45,700 km/s
• C) 47,000 km/s
• D) 54,500 km/s

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Definitions:

Antrum

Cavity of an ovarian follicle filled with fluid containing estrogen.

Prostatic Urethra

The portion of the urethra that runs through the prostate gland, involved in the excretion of urine in males.

Seminal Vesicles

Glands in the male reproductive system that produce and secrete fluid that is a major component of semen.

Peristaltic Contractions

Wave-like muscle contractions that move food through the digestive tract.