The position of a particle moving along the x axis is given by x = 6.0t2 ? 1.0t3, where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?
a. 24 m
b. 12 m
c. 32 m
d. 16 m
e. 2.0 m
d
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When we are lucky enough to see an extra-solar planet transit its star
A) It will cause the star to vanish for several hours. B) We can by the drop in light find the planet's size, mass, and density. C) We can determine what elements are in its atmosphere. D) We can determine its shape. E) We can be certain it is a terrestrial, not a jovian.
Compared to the primary voltage, the secondary voltage can be
A) higher. B) lower. C) the same. D) any of the above E) none of the above
What value of B should be used in a velocity selector to separate out 2.0-keV protons if E is fixed at 80 kV/m?
A. 0.18 T B. 0.11 T C. 0.15 T D. 0.13 T E. 0.23 T
Chemical weathering is most prevalent in what type of climate?
a. Moist and cold b. Dry and cold c. Dry and hot d. Moist and hot