|
Title: The H-R diagram of a young star cluster shows Post by: nmar on Mar 19, 2018 The H-R diagram of a young star cluster shows
a. that high-mass stars have not yet reached the main sequence yet. b. that low-mass stars have not yet reached the main sequence yet. c. mainly giant stars. d. no stars since none have reached the main sequence yet. Question 2 ____________________ are groups of 100,000 to 1,000,000 population II stars firmly bound by gravity. Fill in the blank(s) with correct word Question 3 A jet has an angular length of 10 seconds of arc and flows from a star at a distance of 2,000 pc. How far does this jet extend away from the star? a. 20,000 pc b. 20,000 AU c. 20, 000 ly d. 20,000 miles e. 20,000 km Question 4 The ____________________ of the galaxy contains population I stars, open clusters, and gas clouds. Fill in the blank(s) with correct word Question 5 If the dust around a protostar radiates most strongly at 30 microns or 30,000 nm, what is the approximate temperature of that dust? Hint: T in K = 3,000,000/wavelength in nm or use Wien's Law. a. 100,000 K b. 10,000 K c. 1000 K d. 100 K e. 10 K Title: The H-R diagram of a young star cluster shows Post by: saysay on Mar 19, 2018 Content hidden
Title: The H-R diagram of a young star cluster shows Post by: nmar on Mar 19, 2018 8-) Feeling super confident now, TY
|