If the ________ is good, the atmosphere is stable, and image quality is sharp
Fill in the blank(s) with correct word
seeing
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The most distant stars we can measure stellar parallax for are approximately
A) 50 parsecs away. B) 500 parsecs away. C) 5,000 parsecs away. D) halfway across the Milky Way Galaxy. E) in the Andromeda Galaxy.
The flywheel of a machine is rotating at 126 rad/s. Through what angle will the wheel be displaced from its original position after 6.0 s?
A) 21. radians B) 7.3 × 102 radians C) 1.2 × 102 ° D) 0.32 revolutions E) 7.3 × 10-2 revolutions
There are no auroras on Venus because it
A) is too hot. B) lacks atmospheric oxygen. C) lacks a strong magnetic field. D) lacks strong winds.
Which statement about dark dust clouds is true?
A) They can be penetrated only with longer wavelengths such as radio and infrared. B) They block the vast majority of radio waves from our Galaxy. C) They comprise the majority of the mass of the Galaxy. D) They can be penetrated only with shorter waves, such as UV and X-ray. E) Hydrogen and helium are the chief absorbing and scattering agents.