The neutrino has
A) enormous rest mass, positive charge, and spin quantum number 1/2.
B) negligible rest mass, negative charge, and spin quantum number 1.
C) negligible rest mass, no charge, and spin quantum number 1/2.
D) moderate rest mass, positive charge, and no spin.
C
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Astronomers now speculate that a galaxy's shape depends on all of the following except
a. the rate of star formation. b. the history of past collisions. c. the mass. d. All of these may be important in determining a galaxy's shape
Suppose we want a satellite to revolve around the earth 5 times a day. What should be the radius of its orbit? (The mass of the earth is 5.97 × 1024 kg, G = 6.67 × 10-11 N ? m2/kg2, and you can neglect the presence of the moon.)
A) 1.44 × 107 m B) 0.690 × 107 m C) 7.22 × 107 m D) 2.11 × 107 m
The prediction from special relativity that the length of a moving object will be shortened in the direction of motion is called __________
Fill in the blank(s) with correct word
A conducting sphere of radius 20 cm has a charge Q placed on it producing a field of magnitude
at its surface. More charge is added to the surface until the magnitude of the field at the surface is 2
How much charge was added to the surface?
A. Q/2 B. Q C. 2 Q D. 1.4 Q E. 3 Q