Hipparchus measured accurate star positions and so discovered
What will be an ideal response?
precession
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A cantilever wood pole carries force P 5 300 N applied at its free end, as well as its own weight (weight density 5 6 kN/m3). The length of the pole is L 5 0.75 m and the allowable bending stress is 14 MPa. The required diameter of the pole is approximately:
(A) 4.2 cm
(B) 5.5 cm
(C) 6.1 cm
(D) 8.5 cm
The extent of the continental shelf, an underwater extension of continental crust from shoreline to basin, varies due to fluctuations in sea level. When sea level is lower, the continental shelf is
A) is narrow because less of the continental shelf is exposed. B) is narrow because less of the continental shelf is submerged. C) wider because some of the continental land would be submerged.
Earthquake activity is associated with
A) divergent, convergent, and transform plate boundaries. B) convergent and transform plate boundaries. C) divergent and convergent boundaries. D) transform plate boundaries.
Very small, evenly divided solids that do not settle in solution are called
What will be an ideal response?