The number of different kinds of leptons, including antiparticles as different, is
A)
4.
B)
6.
C)
8.
D)
2.
E)
12.
E
Physics & Space Science
You might also like to view...
An electron enters a magnetic field of 0.75 T with a velocity perpendicular to the direction of the field. At what frequency does the electron traverse a circular path? (mel = 9.11 × 10-31 kg, e = 1.60 × 10-19 C)
A) 2.1 × 1010 Hz B) 4.8 × 10-7 Hz C) 2.1 × 1014 Hz D) 4.8 × 10-11 Hz
Physics & Space Science
When the equation Sb2S3 + HCl ? SbCl3 + H2S is balanced, the coefficient of SbCl3 is
a. 3. b. 1. c. 2. d. 4.
Physics & Space Science
A 2,000 kg car traveling at 30.0 mi/h skids to a stop in 60.0 meters. The force of friction during the skid is (1.0 mi/h = 0.447 m/s)
A. 4,500 N. B. 4,200 N. C. 3,750 N. D. 3,000 N. E. 2,400 N.
Physics & Space Science
The area under a graph of vx vs. t from t = ti to t = tf represents
A.
xi.
B.
xf.
C.
xf?xi.
D.
(xi + xf).E.
xi + xf.
Physics & Space Science