Photons are emitted when a bound electron jumps up to a(n) ________ energy state
A) lower
B) higher
C) zero
D) infinite
A
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In a certain nuclear reactor, neutrons suddenly collide with carbon nuclei, which have 12 times the mass of neutrons
In a head-on elastic collision with a stationary carbon nucleus, what fraction of its initial speed does the neutron have after the collision? A) 11/13 B) 11/12 C) 10/13 D) 1/12 E) 5/6
Exclusion Principle: A hydrogen atom is in the 6h state. Which one of the following is not a magnetic quantum number for that state?
A. 0 B. 1 C. 2 D. 4 E. 6
How do we measure stellar masses?
A) We measure their apparent brightness and distance (from parallax). B) We don't really know: stellar masses are based on an informed guess. C) We measure the orbital periods and velocities of stars in binary systems. D) We measure their density and radius.
What is the potential difference across C2 when C1 = 5.0 ?F, C2 = 15 ?F, C3 = 30 ?F, and V0 = 24 V?
A. 21 V B. 19 V C. 16 V D. 24 V E. 8.0 V