A mass of 375 g hangs from a string that is wrapped around the circumference of a pulley with a moment of inertia of 0.0125 kg?m2 and a radius of 26.0 cm
When the mass is released, the mass accelerates downward and the pulley rotates about its axis as the string unwinds. What is the acceleration of the mass? A) 19.9 m/s2
B) 15.8 m/s2
C) 13.1 m/s2
D) 6.57 m/s2
E) 3.28 m/s2
D
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Olber's Paradox is solved in part by the fact that the universe is neither infinitely large nor infinitely old
Indicate whether the statement is true or false
Which of the following best describes the findings of the Viking landers in the experiments they conducted to search for life on Mars?
A) Some experiments were potentially suggestive of life, but their results could also be explained by chemical reactions not associated with life. B) Absolutely no evidence indicating life was found in the Martian soil. C) The landers detected organic material and evidence for microbial organisms in the soil. D) The experiments failed to operate properly and therefore did not provide any results.
A star with an apparent magnitude of 10 is visible by the naked eye.
Answer the following statement true (T) or false (F)
The circuit below contains three 100-watt light bulbs and a capacitor. The emf ? = 110V. The capacitor is fully charged. Which light bulb(s) is(are) dimmest?
a.
A
b.
B
c.
C
d.
A and B
e.
All three are equally bright (or dim).