An ordinary light bulb consumes 60 W of power. Through what height could a 1000-N object be lifted expending the same amount of power for 6 hours?
A) 1300 m
B) 360 m
C) 720 m
D) 650 m
E) 430 m
A
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Earth's magnetic field is a direct result of its rapid rotation and its molten metallic core
a. True b. False Indicate whether the statement is true or false
A compound microscope is made with an objective lens (f0 = 0.900 cm) and an eyepiece (fe = 1.10 cm). The lenses are separated by a distance of 10.0 cm. What is the angular magnification? (Assume the near point is 25.0 cm.)
A. ?253 B. ?450 C. ?770 D. ?980 E. ?635
This figure shows the circle upon circle motion of a planet in the Ptolemaic model. At which point(s) is the planet in the middle of its period of retrograde motion in our sky?
(a) 2 only
(b) 3 only
(c) 1 only
(d) 1 and 3
A 5.0-C charge is 10 m from a -2.0-C charge. The electrostatic force is on the positive charge is:
A) 9.0 × 108 N toward the negative charge B) 9.0 × 108 N away from the negative charge C) 9.0 × 109 N toward the negative charge D) 9.0 × 109 N away from the negative charge E) none of these