A violet-hot star emits radiation having about twice the peak frequency of radiation from a red-hot star. The surface temperature of the hotter star is about

A) half that of the cooler star.
B) twice that of the cooler star.
C) the same.


Answer: B

Physics & Space Science

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As seen in 1987, when two silicon 28 nuclei fuse, or when seven alpha particles are added to a Si-28 nucleus, the initial result in either case is:

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The power consumed by a device drawing 0.8 A when connected to 120 V is

A) 12 W. B) 15 W. C) 60 W. D) 96 W. E) 120 W.

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What do the orbits of halo and disk stars tell us about the formation of the Milky Way?

What will be an ideal response?

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