The COBE data, combined with computer simulations, strongly supported the ________ epoch, showing how ripples in the background radiation could collapse into galaxies over time
Fill in the blank(s) with correct word
inflationary
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If you had only one telescope and wanted to take both visible-light and ultraviolet pictures of stars, where should you locate your telescope?
A. on Earth’s surface B. on a tall mountain C. in an airplane D. in space
The total amount of power (in watts, for example) that a star radiates into space is called its
A) apparent brightness. B) absolute magnitude. C) luminosity. D) flux.
What are appropriate measures of risk? Judge how they might be used
What will be an ideal response?
An alpha particle is moving at a speed of 5 × 105 m/s in a direction perpendicular to a uniform magnetic field of strength 4 × 10-2 T. The charge on an alpha particle is 3.2 × 10-19 C and its mass is 6.6 × 10-27 kg
(a) The radius of the path of the alpha particle is (b) The time it takes the alpha particle to complete one revolution around its path is