If a star has a parallax of .005", then its distance is ________ light-years
Fill in the blank(s) with correct word
660
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Two point charges q1 = 4.0 ?C and q2 = -8.0 ?C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, respectively. What is the electric potential energy of this system of charges?
A) +1.4 J B) -1.4 J C) -32 J D) 4.0 J E) -4.0 J
Can two microscopic [or quantum] particles be entangled even when they are exerting no forces on each other?
A) Yes, because they can still communicate with each other by means of electromagnetic radiation. B) Yes, they could be entangled but so far apart as to exert no significant forces on each other. C) No, because entanglement occurs only by means of the electromagnetic force and the other fundamental forces. D) No, because in order for a particle to be trapped in the field of another particle, it must feel the second particle's force field. E) No, because the psi field is actually a force field.
The linear relationship between stress and elastic strain is known as _____________law
Fill in the blank(s) with the appropriate word(s).
The pair of protons in the nucleus of a helium atom
A) attracts a pair of orbiting electrons. B) repels orbiting electrons. C) both of these D) neither of these