Astronomers can use ____ to measure magnetic fields on the sun

a. helioseismology
b. perchloroethylene (C2Cl4)
c. neutrino detectors
d. a magnetic carpet
e. the Zeeman effect

E

Physics & Space Science

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Which is the correct description for the Sun's location in the Galaxy?

A) At the outer edge of the bulge, but along the Galactic equator B) About 30,000 ly out in the halo C) At the very outer edge of the disk, but in the Galactic plane D) In the disk near the Galactic center E) In the disk, and about half way out from the center

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Protons in the nucleus attract electrons with enough electromagnetic force to keep them in orbit at high speeds. Protons in general repel each other, but in the nucleus they are bound together. How is this possible?

The introduction of neutrons diffuses the protons' charge over a large volume The strong force binds the protons together on small distance scales The electrons orbiting the nucleus create an electromagnetic force on all sides due to their high speed of revolution The gravitational force binds the protons together on small distance scales The electroweak force binds the protons together on small distance scales

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The Big Dipper is

a. a circumpolar constellation for southern hemisphere observers. b. always on an observer's zenith. c. an asterism. d. only visible from the southern hemisphere. e. a constellation.

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In an RLC circuit, the resistance is 10. ohms, the capacitive reactance is 30. ohms, and the inductive reactance is 50. ohms. What is the circuit impedance?

A) 10. ? B) 22. ? C) 90. ? D) 63. ? E) 81. ?

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Physics & Space Science