Vicki very closely examines her new ruby ring with the jeweler's "loop." The ruby appears 7.0 times larger through this lens than when she views it close-up without the "loop"
If her near point is 35 cm, what is the focal length of the lens of the "loop"?
A) 5.8 cm B) 6.7 cm C) 4.2 cm D) 3.6 cm E) 7.0 cm
A
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Why are the layers of ice and dust in Mars's permanent ice caps not all the same thickness?
A. Jupiter's gravity affects Mars's climate. B. Mars's axial tilt has changed over time. C. Mars's orbital eccentricity has changed over time. D. All of these choices are correct.
This is the H-R diagram for stars in a 12-billion-year-old globular cluster. Based on our understanding of stellar lives, which of the four labeled stars is currently generating energy through hydrogen fusion in a shell around an inert (nonfusing) helium core?
A) I B) II C) III D) IV
The amount of inertia a body has can be measured by finding its ________.
Fill in the blank(s) with the appropriate word(s).
A large telescope of mass 8410 kg is in a circular orbit around the earth, making one revolution every 927 minutes
What is the magnitude of the gravitational force exerted on the satellite by the earth? (G = 6.67 × 10-11 N ? m2/kg2, Mearth = 6.0 × 1024 kg)