Hubble's law can be applied to measure the distance of the constellation of Orion.
Answer the following statement true (T) or false (F)
False
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The work done by kinetic friction is equal to
A. ?Eth and fk*?x B. ?Eth C. fk*?x D. None of these
Calculate the displacement amplitude (in m) of a 20 kHz sound wave in helium if it has a pressure amplitude of 8.0 × 10^?3 N/m2 . (? = 0.179 kg/m3, v = 972 m/s.)
a. 2.9 × 10^?10 b. 3.7 × 10^?10 c. 7.8 × 10^?9 d. 2.4 × 10^?9 e. 1.9 × 10^?10
If a fossil bone is found to contain 1/16th as much Carbon-14 as the bone of a living animal, what is the approximate age of the fossil? (half-life of 14C = 5730 years)
a. 7640 years c. 45,800 years b. 22,900 years d. 17,200 years
Most of the Rocky Mountains, in the western United States, lie in the ______________ Standard Time zone
a. Mountain b. Eastern c. Central d. Pacific