Which of the following is not a quantum number associated with elementary particles and their interactions?
e.
There is no quantum number governing the behavior of the gluon because the gluon is a gauge boson, or force carrier.
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A point charge of 3.0 ?C is located on the y-axis at y = 4.0 m, and another point charge of 6.0 ?C is located on the x-axis at x = 5.0 m. What is the direction (ccw from x axis) of the electric field at (5.0 m, 4.0 m)?
A. 72
B. 18
C. 25
D. 53
E. 34
Sunspot numbers follow a seven-year cycle
a. True b. False Indicate whether the statement is true or false
A simple pendulum and an object oscillating on an ideal spring both have period T in an elevator at rest. If the elevator now moves downward at a uniform 2 m/s, what is true about the periods of these two systems?
A) Both periods would remain the same. B) Both periods would increase. C) Both periods would decrease. D) The period of the pendulum would increase but the period of the spring would stay the same. E) The period of the pendulum would decrease but the period of the spring would stay the same.
The figure shows the orientation of a rectangular loop consisting of 80 closely wrapped turns each carrying a current I
The magnetic field in the region is 
mT. The loop can turn about the y axis. If ? = 30°, a = 0.40 m, b = 0.30 m, and I = 8.0 A, what is the magnitude of the torque exerted on the loop?
?
?
a.
2.5 N ? m
b.
1.5 N ? m
c.
3.1 N ? m
d.
2.7 N ? m
e.
0.34 N ? m