A runner leaves the starting blocks and accelerates at 2.60 m/s2 for 4.00 s. What speed does the runner reach?
A)
32.0 m/s
B)
10.4 m/s
C)
23.3 m/s
D)
1.45 m/s
E)
4.65 m/s
B
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A resistor and an ideal inductor are connected in series to an ideal battery having a constant terminal voltage V0. At the moment contact is made with the battery,
(a) the voltage across the resistor is A) V0. B) V0/e. C) V0/2. D) zero. (b) the voltage across the inductor is A) V0. B) V0/e. C) V0/2. D) zero.
Briefly describe one of the three quandaries that are solved by inflation; that is, describe either the structure problem, the smoothness problem, or the flatness problem
What will be an ideal response?
Astronomers believe that the X-ray radiation from the nuclei of active galaxies comes from ________.
A. gravity waves B. a black hole C. magnetic fields D. the accretion disk around a massive black hole
This diagram represents the carbon dioxide cycle. Which position in the diagram represents the part of the cycle in which carbon dioxide is turned into carbonate minerals and rock?
A) Position 1 B) Position 2 C) Position 3 D) Position 4