Aristotle believed that natural laws could be understood by _______. In contrast to Aristotle's way of explaining nature, Galileo relied on __________.
A. logic; experiment
B. experiment; logic
C. mathematics; patterns
D. patterns; mathematics
Answer: A. logic; experiment
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A long line of charge with charge per unit length ?1 is located on the x-axis and another long line of charge with charge per unit length ?2 is located on the y-axis with their centers crossing at the origin
In what direction is the electric field at point z = a on the positive z-axis if ?1 and ?2 are positive? A) the positive z-direction B) halfway between the x-direction and the y-direction C) the negative z-direction D) all directions are possible parallel to the x-y plane E) cannot be determined
A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg?m2. If the arms are pulled in so the moment of inertia decreases to 1.80 kg?m2, what is the final angular speed?
A) 2.25 rad/s B) 4.60 rad/s C) 6.25 rad/s D) 1.76 rad/s E) 0.81 rad/s
In general, as a telescope's diameter increases, its angular resolution ________
Fill in the blank(s) with correct word
Periodic waves with a period of 0.026 s travel along a rod at 1200 m/s. What is the wave number k of the waves?
A) 5.0 m-1 B) 31 m-1 C) 6.9 m-1 D) 0.20 m-1 E) 68 m-1