A headwaiter at a restaurant decides to apply the exclusion principle to the seating of patrons. He will treat tables as sub-shells, and will only seat patrons if the number of the people to be seated adds up to a complete sub-shell. Of the numbers below, the number he would not be willing to seat at one table is
a. 2.
b. 4.
c. 6.
d. 10.
e. 14.
B
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A) 1 solar-mass star B) 2 solar-mass star C) 3 solar-mass star D) 4 solar-mass star
In the Compton effect, as the scattering angle increases, the frequency of the X-rays scattered at that angle
A) increases. B) decreases. C) does not change. D) varies randomly.
Three essential components of a nuclear reactor are: a fissionable fuel ,a coolant to transfer the heat, and
A) a "scrubber" to prevent radioactive isotopes from getting into the environment. B) a radioactive substance to keep the reaction going. C) tritium to speed up the neutrons. D) control rods. E) lead to stop the neutrons.
A 30-kg child rides on a circus Ferris wheel that takes her around a vertical circular path with a radius of 20 m every 22 s. What is the magnitude of the resultant force on the child at the highest point on this trajectory?
a. 49 N b. 0.29 kN c. 0.34 kN d. 0.25 kN e. 0.76 kN