A protostar of 20 solar masses will probably turn into a type O main sequence star
Indicate whether the statement is true or false
TRUE
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Assume everyone in the United States consumes one soft drink in an aluminum can every two days. If there are 270 million Americans, estimate how many tons of Aluminum needs to be recycled each year if each can weighs 1/16 pound and one ton = 2000 pounds.
A. 750,000 tons B. 1.5 million tons C. 1.75 million tons D. 3 million tons E. 1,600,000 tons
If you want to see the image formed by a telescope, you should place your eye at the location of the telescope's
A) focus. B) primary mirror. C) secondary mirror. D) central hole in the primary mirror. E) Cassegrain.
In which wavelength regions is it easiest to identify and study the accretion disk around a white dwarf in a binary system?
A) visible and infrared light B) infrared and radio light C) x-ray and ultraviolet light D) gamma ray and x-ray light E) radio and visible light
Striations are long parallel scratches in
A) glaciers that show flow direction. B) bedrock that show the direction of the glaciers flow. C) bedrock that form next to roches moutonnées. D) bedrock that show outwash flow direction.