Raster images consist of a group of separate drawing objects.
Answer the following statement true (T) or false (F)
False
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In the context of blackbody radiation, which of the following statements is true of stars?
A) Temperatures of stars cannot be estimated from their color. B) Red stars are cool, and blue stars are hot. C) Red stars are hot, and blue stars are cool. D) Star temperatures cannot be measured using the relative strengths of various spectral lines.
A clown at the circus blows up a balloon with helium. This balloon will not float to the ceiling unless
A. the pressure of the helium inside the balloon is less than the atmospheric pressure. B. the balloon and the helium it contains weigh less than the air displaced by the balloon. C. the pressure of the helium inside the balloon is greater than the atmospheric pressure. D. the weight of the balloon is less than the weight of the air displaced by the balloon.
Consider an atom with four accessible energy levels. What is the maximum number of different wavelengths that could be emitted by such an atom?
A) 7 B) 4 C) 6 D) 5 E) 8
When can radio telescope be used?
What will be an ideal response?