Suppose we have a box containing an electron with the lowest possible energy E1. Imagine that we slowly squeeze the box, making its length L smaller. What will happen to the electron’s energy? The electron’s energy will
A. Increase.
B. Decrease.
C. Remain the same.
A. Increase.
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Two speakers are driven exactly out of phase with each other at 256 Hz. If a microphone is placed on the line between the two speakers exactly in the middle of the line, what is possibly the distance between the microphone and each speaker? The speed of sound is 340 m/s.
A. 0.75 m B. 0.38 m C. Can be any distance at all D. 1.50 m E. 0.94 m
The rings of Uranus were discovered from Earth when the planet occulted a star
Indicate whether the statement is true or false
Suppose you have two capacitors and want to use them to store the maximum amount of energy by connecting them across a voltage source. You should connect them
A) in parallel across the source. B) in series across the source. C) It doesn't matter because the stored energy is the same either way.
Consider ground-state helium having two electrons in orbit. If one of the electrons has quantum numbers (n, ?l, m1, ms) of 1, 0, 0, -1/2 respectively, the quantum numbers for the other electron will be
A) 1, 1, 1, +1/2. B) 1, 1, 0, -1/2. C) 1, 0, 0, +1/2. D) none of the given answers.