A bucket in an old well is hoisted upward by a rope which winds up on a cylinder having a radius of 0.050 m. How many rev/s must the cylinder turn if the bucket is raised at a speed of 0.20 m/s?
a. 3.0 rev/s
c. 0.48 rev/s
b. 1.5 rev/s
d. 0.64 rev/s
D
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Why are star clusters almost ideal "laboratories" for stellar studies?
A) All stars in the cluster are the same size and luminosity. B) Their combined light makes them much easier to spot from a distance. C) Stars in clusters have the same age, similar composition, and are at the same distance away. D) Stars in clusters are all relatively young and therefore shine brightly. E) Like our Sun, stars in clusters are always located in the plane of the Milky Way Galaxy.
The Pauli Exclusion Principle states
a. no two electrons in the same atom can have the same set of quantum numbers. b. there is an inherent uncertainty in the position and momentum of a particle. c. when an atom has orbitals of equal energy, the maximum number of electrons will have unpaired spins. d. when an atom has orbitals of equal energy, the maximum number of electrons will be paired spins. e. no two atoms can have the same set of quantum numbers.
Polls and quizzes are examples of animated content.
Answer the following statement true (T) or false (F)
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Answer the following statement true (T) or false (F)