The Moon is 3.84 × 108 m from Earth and takes 27.3 days to complete each orbit. What are the magnitude and direction of the acceleration of the Moon, assuming a circular orbit?
What will be an ideal response?
2.72 × 10-3 m/s2, toward Earth
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Consider a two-slit interference experiment like the one shown in figure Q3.7b. The distance between adjacent bright spots in the interference pattern on the screen (A) increases, (B) decreases, or (C) remains the same if, The width of the slits increases
A. increases B. decreases C. remains the same
If the hypothesis tracing the extinction of the dinosaurs to an impact is correct, the dinosaurs died off largely because
A) of injuries suffered from direct hits of pieces of the asteroid or comet. B) radiation from iridium in the asteroid caused the dinosaurs to die of cancer. C) of global climate effects initiated by dust and smoke that entered the atmosphere after the impact. D) the impact caused massive earthquakes worldwide.
One fundamental difference between a particle and its antiparticle is the
A. number of quarks contained in each particle. B. charge, if the particle has a charge. C. spin. D. mass.
Suppose that in an experiment, different results are obtained from a subset than the results obtained from the whole. What term would best explain this?
a. probability b. trend c. variable d. statistically significant e. sampling error