Which of the following can actually escape a black hole?
A. visible light
B. electrons
C. very low energy radio waves
D. very high energy gamma rays
E. None of these choices is correct.
Answer: E
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Magnetic Field of a Long Wire: At a point 10 m away from a long straight thin wire, the magnetic field due to the wire is 0.10 mT. What current flows through the wire? (?0 = 4? × 10-7 T ? m/.A
Fill in the blank(s) with the appropriate word(s).
The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T that are perpendicular to the page. A set of directions A through H is shown next to the diagram. When the two equal currents in the wires are directed up out of the page, the direction of the magnetic field at P is closest to the direction of
a.
E.
b.
F.
c.
G.
d.
H.
e.
A
Almost all stars on the main sequence range from 1 to 10 solar luminosities
Indicate whether the statement is true or false
A positively charged particle is released from rest in a uniform electric field. Which statement regarding the electron is correct?
a. The particle's kinetic energy increases. b. The particle's total energy increases. c. The electric potential at the particle's location increases. d. The particle's associated electric potential energy increases. e. None of the statements are correct.