A 50-kg load is suspended from a steel wire of diameter 1.0 mm and length 11.2 m. By what distance will the wire stretch? Young's modulus for steel is 2.0 × 1011 Pa
A) 1.5 cm
B) 2.5 cm
C) 3.5 cm
D) 4.5 cm
C
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The longest-daylight day for people in the Southern Hemisphere at latitudes greater than 30°S occurs at the
a. summer solstice. b. vernal equinox. c. winter solstice. d. autumnal equinox.
An electron in a hydrogen atom makes a transition from the n = 4 to the n = 3 energy state. Determine the energy (in eV) of the emitted photon
a. 0.54 b. 0.66 c. 0.85 d. 1.51 e. 10.2
Heat is a form of energy, and it has long been known that heat energy will naturally flow
A. from solids to liquids, but only when the solid is melting. B. from hot to cold objects. C. from cold to hot objects. D. from liquids to solids, except when the solid is melting.
Synchrotron radiation produces a(n) ________ spectrum
A) continuous nonthermal B) emission line C) absorption line D) continuous, with some absorption lines E) continuous, with some emission lines