An eccentric billionaire wants to build a mansion in a location on Earth where the effect of the seasons is least pronounced. Where should his personal astronomer advise him to build?
A. at the North Pole
B. New Jersey
C. at the Tropic of Cancer
D. at the equator
at the equator
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A circular steel rod 0.005 m in radius and 4.000 m long is subject to an axial force of 0.250 × 105 newtons. We observe that the rod elongates 0.616 × 10-2 m. Calculate the tensile stress and the axial strain in the rod.
What will be an ideal response?
Which of the following was not a part of Dalton's atomic theory?
a. Each element is composed of atoms, which are identical for that element. b. The reactivity of elements involves changes in their electron configuration. c. Chemical combination is the bonding of a definite number of atoms of each of the combining elements. d. No atoms are gained, lost, or changed in identity during a chemical reaction.
About how many potentially hazardous asteroids pass within 0.05 AU of the Earth per decade in modern times?
A) None B) 10-20 C) 200-300 D) 5000-1000 E) A completely unknown quantity; it could easily be anywhere from just a few to millions.
During the eighteenth and nineteenth centuries, attempts to precisely measure the astronomical unit relied largely on rare
A) total solar eclipses. B) transits of the inferior planets across the Sun. C) passages of comets close to the Earth. D) maximum elongations of Venus. E) oppositions of Mars.