The Moon's albedo is ______________
Fill in the blank(s) with correct word
0.07, or 7%
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A car on a roller coaster starts at zero speed at an elevation above the ground of 26 m. It coasts down a slope, and then climbs a hill. The top of the hill is at an elevation of 16 m. What is the speed of the car at the top of the hill?
Neglect any frictional effects. A) 14 m/s B) 18 m/s C) 10 m/s D) 9.0 m/s E) 6.0 m/s
The _____ is the average density of the Universe needed to make its curvature flat
A) relative density B) arithmetic density C) nuclear density D) critical density
The ____________________ of a star can be determined from its color
Fill in the blank(s) with correct word
Imagine that you feed alternating current to an inductor with high inductance and very low resistance. Suppose we slowly increase the frequency of this alternating current while keeping the amplitude ?0 of the applied emf constant. How does the amplitude i0 of the alternating current flowing in the coil change (or does it)?
A. 25,000 B. 4000 C. 2500 D. 40 E. 25 F. Some other result (specify). T. One needs more information to answer.