The geography of Uranus's moon Miranda suggests it may have been broken apart into pieces by an impact and then drawn back together out of order by gravity.
Answer the following statement true (T) or false (F)
True
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An object of length 5.00 cm is inside a plastic block with index of refraction 1.50 . If the object is viewed from directly above, what is the length of its image?
a. 5.00 cm b. 7.50 cm c. 3.33 cm d. 4.08 cm e. 2.22 cm
What is the likely reason that we cannot find any examples of the first generation stars?
A) The first generation stars are too faint to be visible now. B) The first generation stars formed such a long time ago that the light from them has not yet had time to reach us. C) The first generation stars were all very massive and exploded as supernova. D) The first generation stars formed with only H and He and therefore have no spectral features. E) We do not know how the first generation stars were formed.
When an electron collides with a positron the two particles
A) fuse to form a heavier particle B) bounce off each other C) are destroyed, producing a pair of high-energy gamma rays D) are destroyed, producing another pair of particles
Estimate the number of times Earth will rotate on its axis during a human's lifetime
A) 3 × 104 B) 3 × 105 C) 3 × 106 D) 3 × 107 E) 3 x 108