Philosophers of the ancient world attempted to deduce truth about the Universe by reasoning from _____
A) careful observations
B) geometric models
C) personal experience
D) first principles
D
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River water flows around a circular 20-cm-diameter pier at 0.01 m/s. The flow is:
(A) Creeping flow (B) Flow with a wake (C) Stokes flow (D) Low-Reynolds-number flow
The brightest main-sequence star in a cluster has a surface temperature of 10,000 K and a luminosity of about 10 LSun. Referring to the figure above as needed, what is the approximate age of the cluster?
A) 107 years B) 109 years C) 1011 years D) 1013 years
The ocean can be divided into several vertical layers—the surface zone, a transition zone, and the deep zone. As one descends to lower depths, water pressure ________ and temperature ________
A) increases; decreases B) decreases; increases C) increases; increases D) decreases; decreases
Which of the following parameters will dictate whether a particular solar eclipse appears as a total or an annular eclipse to an observer?
What will be an ideal response?