Photons are emitted when a bound electron jumps up to a(n) ________ energy state

A) lower
B) higher
C) zero
D) infinite


A

Physics & Space Science

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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

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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

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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.

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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

Physics & Space Science