A loop of gas following the magnetic field lines between sunspots' poles is:

A) a flare.
B) a ray.
C) a coronal hole.
D) a prominence.
E) a coronal mass ejection.


D

Physics & Space Science

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Because the Hubble constant has a value of 70 km/s/Mpc, a galaxy 50 Mpc away would have a recession velocity of _______________ km/s. (Round your answer to the nearest 1 km/s)

Fill in the blank(s) with correct word

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Starting from the core, the internal temperature of the Sun decreases gradually until reaching the photosphere.

Answer the following statement true (T) or false (F)

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What is "excluded" by the Pauli exclusion principle?

a. certain values of angular momentum b. precise values of both position and momentum c. electrons in the same quantum state d. none of the above

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Charge of uniform density (0.30 nC/m2) is distributed over the xy plane, and charge of uniform density (?0.40 nC/m2) is distributed over the yz plane. What is the magnitude of the resulting electric field at any point not in either of the two charged planes?

A. 40 N/C B. 34 N/C C. 28 N/C D. 46 N/C E. 6.0 N/C

Physics & Space Science