Matter falling into a black hole arranges itself in the shape of a ____
a. spherical shell that is thick at the edges and thin closer to the center
b. spherical shell that is thin at the edges and thick closer to the center
c. disk that is thick at the outer edge, thin along the inner ring
d. disk that is thin at the outer edge and thick closer to the center
e. disk that is thin from the outer edge to the center
c
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The paths of the planets' orbits lie in all different directions in the sky.
Answer the following statement true (T) or false (F)
Surface tension of liquids
A) increases when wetting agents are added. B) decreases as the liquid temperature increases. C) is about the same for all liquids. D) results from a thin molecular membrane beneath the liquid surface. E) keeps steel ships afloat.
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
A 10-cm focal length converging lens is used to magnify small newspaper print 2.0 mm high. Calculate the height of the image (in mm) for the maximum magnification for a normal eye
a. 3.5 b. 7.0 c. 9.2 d. 12 e. 2.5