A box is launched up a frictionless incline with an angle of elevation ?. The maximum height reached by the box is h. The box is again launched up the incline with the same initial speed it had before, but this time the angle of elevation has been increased to ?. How does the maximum height H reached this time by the box compare with the previous value h?
a. H = h b. H > h
c. H < h d. H = ((sin?)/(sin?))
a
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If a galaxy is receding from us at 0.10c. Use Hubble's law to estimate the distance to this galaxy if the Hubble constant is 22 km/s per million light-years. (c = 3.00 × 108 m/s, 1 ly = 9.461 × 1015 m, 1 y = 3.156 × 107 s)
A) 1.4 × 109 ly B) 1.4 × 107 Mly C) 6.6 × 105 Mly D) 2.2 Mly E) 6.6 × 105 ly
This bar graph is based on statistical study of results from the Kepler mission. Which of the following conclusions is supported by the graph?
A) At least about 15% of stars have a planet similar in size to Earth. B) Most stars with an Earth-sized planet do not have any larger jovian planets orbiting far from their stars. C) Most stars have five planets. D) A star orbited by a super-Earth is likely also to be orbited by a mini-Neptune.
How do you think citrus growers in Florida might use heat of fusion to protect against frost damage?
The annealing point for the soda-lime glass in Figure 9.3 is approximately _________K
Fill in the blank(s) with the appropriate word(s).