As I pull a rope connected to a box at constant speed up a frictionless slope, pulling parallel to the slope, the tension in the rope will be:
a. greater than the tension would be if the box were stationary.
b. greater than the weight of the box.
c. equal to the weight of the box.
d. less than the weight of the box.
d
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An ideal solenoid with 3000 turns is 70.0 cm long. If its self-inductance is 25.0 mH, what is its radius? (?0 = 4? × 10-7 T ? m/A)
A) 0.0222 m B) 52.0 m C) 0.00199 m D) 327 m
An ideal gas is allowed to expand slowly. The system is thermally isolated. Which statement regarding the final temperature is true?
When rubbing two insulators together, the one that gets a positive charge has had
A. protons added. B. protons removed. C. electrons added. D. electrons removed. E. electrons added and protons removed.
For what reason was Pluto demoted from full planetary status in 2006?
A) because of objects as large or larger than Pluto in the Kuiper belt B) because Pluto resides outside of the zone that can truly be described as the solar system C) because Pluto was discovered to be a twin planet system D) because according to the standard definition, no planet can be smaller than the Earth's moon