Angular Quantities: Express the angular speed of an old 33 1/3 rpm LP in rad/s.
Fill in the blank(s) with the appropriate word(s).
3.49 rad/s
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Which of the following is true of ancient astronomers?
A) They believed that each star could be part of only one constellation. B) They believed that the sky was a great sphere surrounding Earth. C) They believed that Earth revolved around the Sun. D) They believed that stars were scattered through space at different distances.
After their rocket engines shut off, astronauts experience weightlessness in the orbiting Space Shuttle,
A. and they are accelerating because they are actually in free-fall. B. and they are accelerating because they have constant velocity as they pass overhead. C. but they cannot accelerate because their rocket engines are shut off. D. but they are not accelerating, since nothing actually has weight in space.
The phase angle of an RLC series circuit with a capacitive reactance of 40 ?, a resistor of 100 ? and a certain inductor at 1000 Hz is 40.0°. What is the value of the inductance in this circuit?
A) 11.8 mH B) 124 mH C) 212 mH D) 61.9 mH E) 19.7 mH
If the barrier width for an STM is 0.1 nm, what would be the corresponding minimum momentum uncertainty of an electron traversing this boundary?
a. 10–25 kg•m/s c. 10–24 kg•m/s b. 10–23 kg•m/s d. 10–22 kg•m/s