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Spica is a bright star with apparent magnitude in the V filter mv=.98 and a parallax angle of 0.0125 arcsec. Thus, Mv= -3.54. Spica has an apparent magnitude in the B filter mB=.68. Thus, the color index B-V= -0.3
Q) The color index of another bright star in our summer sky, Antares, is B-V=1.67. Is Spica hotter or cooler than Antares? Explain your answer (you should include some discussion of the properties of blackbody radiators in your answer).
a person pulls a toboggan for a distance of 30.0 m along the snow with a rope directed 20.0deg above the snow. the
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The critical angle for total internal reflection at a benzene-air interface is 41.8 degree. Find what angle does the refracted ray in the liquid make with the normal
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