The intricate patterns visible in an X-ray image of the Sun generally show ________
A) structure within sunspots
B) a bubbling pattern on the photosphere
C) helioseismological fluctuations
D) extremely hot plasma flowing along magnetic field lines
D
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An observer on a planet sees a spaceship approaching at 0.5c. A beam of light projected by the ship would be measured by this observer to travel at:
A) 0.25c. B) 0.5c. C) c. D) 1.5c. E) 2.5c.
The mass of a supermassive black hole thought to power a typical bright active galactic nucleus is roughly ________
A) 1 billion solar masses B) 3 solar masses C) 10 solar masses D) 1 trillion solar masses
Current is the rate of flow of electric charge
a. True b. False Indicate whether the statement is true or false
The ?0 meson has a mass of 264 times that of an electron
What is the approximate range of the force mediated by this particle? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 1.5 × 10-14 m B) 1.5 × 10-10 m C) 1.5 × 10-12 m D) 1.5 × 10-15 m