Because the Moon has a low average density and no magnetic field, then its dense core must be _______________
Fill in the blank(s) with correct word
small
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What mode of fracture is present for a smooth tensile specimen when a small amount of plastic strain creates a crack that is of sufficient length to cause fracture?
(a) Mode I (b) Mode II (c) Mode III (d) Ductile
What is the nuclear radius of 90Sr?
A) 4.0 × 10-15 m B) 1.2 × 10-15 m C) 1.1 × 10-13 m D) 5.4 × 10-15 m E) 3.3 × 10-13 m
Work-Energy Theorem: Which requires more work, increasing a car's speed from 0 mph to 30 mph or from 50 mph to 60 mph?
A. 0 mph to 30 mph B. 50 mph to 60 mph C. It is the same in both cases.
Why does the image show very few stars?
A: It is hard to find stars in the Milky Way Galaxy, so it would have been too difficult to select a region that had many. B: Stars are only visible in radio waves, and the Hubble Deep Field image was taken in the optical region of the spectrum. C: Stars are only visible in the optical region of the spectrum, and the Hubble Deep Field image was taken with a radio telescope. D: It was chosen so that bright stars in the Milky Way Galaxy do not interfere with our picture of the distant universe. E: The scientists were interested seeing the light of galaxies through a region of space filled with black holes.