In the diagram below, draw the transition that would emit a photon with the smallest wavelength
a line from the Fifth Level to the First Level
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At what speed would a 100. meter long spaceship appear to be 60. meters long?
A) 2.4 × 103 Km/s B) 0.24 m/s C) 24. Mm/s D) 240. Mm/s E) 2.4 Gm/s
When you touch a warm pot on the stove,
A) work flows from your hand to the pot. B) work flows from the pot to your hand. C) thermal energy flows from your hand to the pot. D) thermal energy flows from the pot to your hand. E) electric energy flows from the pot to your hand.
The hydrogen in the universe was formed by
a. the energy of the Big Bang. b. nuclear fusion reactions in stars. c. radioactive decay of heavy elements. d. none of the above.
In a certain cyclotron, a proton of mass 1.67 × 10-27 kg moves in a circle of diameter 1.6 m with an angular speed of 2.0 × 106 rad/s. What is the angular momentum of the proton?
A) 1.3 × 10-21 kg ? m2/s B) 1.8 × 10-21 kg ? m2/s C) 2.1 × 10-21 kg ? m2/s D) 3.2 × 10-21 kg ? m2/s