A helium nucleus?
A. A
B. B
C. C
D. D
E. zero
F. Other
G. AA
H. BB
I. CC
J. DD
H. BB
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Explain the three different hypotheses for the origin of the Moon and how evidence from the Apollo lunar rocks persuaded scientists to develop a new hypothesis
What will be an ideal response?
Charge of uniform density (40 pC/m2) is distributed on a spherical surface (radius = 1.0 cm), and a second concentric spherical surface (radius = 3.0 cm) carries a uniform charge density of 60 pC/m2. What is the magnitude of the electric field at a point 2.0 cm from the center of the two surfaces?
A. 1.1 N/C B. 4.5 N/C C. 1.4 N/C D. 5.6 N/C E. 0.50 N/C
A boy on a skate board skates off a horizontal bench at a velocity of 10 m/s. One tenth of a second after he leaves the bench, to two significant figures, the magnitudes of his velocity and acceleration are:
a. 10 m/s; 9.8 m/s2. b. 9.0 m/s; 9.8 m/s2. c. 9.0 m/s; 9.0 m/s2. d. 1.0 m/s; 9.0 m/s2. e. 1.0 m/s; 9.8 m/s2.
Which of these is considered true about the mass of the neutrino?
a. It is the same as the mass of an electron or positron. b. It is the same as the mass of a nucleon. c. It is the same as the mass of an alpha particle. d. It is zero. e. It is slightly more than zero, but less than an electron.