The number of degrees of freedom of a rigid diatomic molecule is:
A. 2
B. 3
C. 4
D. 5
E. 6
Answer: D. 5
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Swimmers at a water park have a choice of two frictionless water slides as shown in the figure
Although both slides drop over the same height, h, slide 1 is straight while slide 2 is curved, dropping quickly at first and then leveling out. How does the speed v1 of a swimmer reaching the end of slide 1 compares with v2, the speed of a swimmer reaching the end of slide 2? A) v1 > v2 B) v1 < v2 C) v1 = v2 D) No simple relationship exists between v1 and v2 because we do not know the curvature of slide 2.
A hockey puck traveling at speed v on essentially frictionless ice collides with one end of a straight stick lying flat on the ice and sticks to that end. In this collision
A. momentum is conserved. B. angular momentum is conserved. C. energy is conserved. D. all of the above are conserved. E. only momentum and angular momentum are conserved.
According to the standard model of elementary particle physics, there are six flavors of quarks, each of which comes in three colors
a. True b. False Indicate whether the statement is true or false
The direction of a magnetic field at a point can be determined by
a. a generator b. a compass c. a transformer d. electromagnetic induction e. none of the above