An observer is moving in space toward a distant star at 200 km/s while the star is moving toward the observer at 400 km/s; the relative velocity being 600 km/s of approach. What relative change in frequency of the light from the star as seen by the observer? (The speed of light in space is 3.00 105 km/s).
a. 0.067 increase
c. 0.20 increase
b. 0.20 decrease
d. 0.033 decrease
Question 2
Which best describes a system made up of ice, water, and steam existing together?
a. absolute zero
c. ice point
b. triple point
d. steam point
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