The Z0 boson is a mediator of weak interactions. It mass is 93 GeV/c2. About what is the range of this weak interaction?
A. 10-15m
B. 10-18m
C. 10-21m
D. 10-24m
E. 10-27m
B. 10-18m
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What is the best evidence for an extremely massive black hole in the center of the Milky Way?
A) The center of our galaxy hosts a pulsar that is spinning so fast that it could only be a black hole. B) We observe stars vanishing in the center of the Galaxy as they are sucked into the black hole. C) Huge amounts of X-rays are pouring out of the center of the galaxy. D) The orbits of stars in the center of the galaxy indicate that the presence of 3 to 4 million solar mass object in a region no larger than our Solar System.
A plane has an airspeed of 200 m/s northward, and is in a wind of 50.0 m/s to the west. The plane's speed relative to the ground is
A) 200 m/s. B) 150 m/s. C) 250 m/s. D) 206 m/s.
If the speed of an object in circular motion is increased by a factor of 3, its centripetal acceleration for the same radius will be multiplied by a factor of
a. 0.111. b. 0.333. c. 1.73. d. 9. e. 3.
What is the impedance at 1500 Hz if a 100-? resistor, 20-mH coil, and 1.0-?F capacitor are connected in series?
A) 0.19 k? B) 82 ? C) 0.13 k? D) 0.11 k?