The overall result of the proton-proton chain is
A) 6 H becomes 1 He + energy.
B) p + p becomes 2H + energy.
C) 4 H becomes 1 He + energy.
D) Individual protons are joined into long chains of protons.
C
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A 2.50 A current is carried by a copper wire of radius 1.0 mm. If the density of conduction electrons is 
what is the drift velocity of the conduction electrons?
A. 
B. 
C. 
D. 
E. 
State Gauss's law
What will be an ideal response?
As an object moves from point A to point B only two forces act on it: one force is conservative and does -70 J of work, the other force is nonconservative and does +50 J of work. Between A and B,
a. the kinetic energy of object increases, mechanical energy increases. b. the kinetic energy of object decreases, mechanical energy increases. c. the kinetic energy of object decreases, mechanical energy decreases. d. the kinetic energy of object increases, mechanical energy decreases. e. None of the above.
You have discovered a new asteroid, which has a moon in an elliptical orbit around it
From a series of observations, you establish that the closest approach occurs when the moon is 51,000 m from the asteroid, the furthest separation is 102,000 m, and the speed of the moon at the point of closest approach is 7.50 m/s. What is the mass of the asteroid? G = 6.67 x 10-11 N•m2/kg2.A) 4.25 × 1016 kg B) 9.87 × 1016 kg C) 3.22 × 1016 kg D) 2.04 × 1016 kg E) 5.05 × 1016 kg