A tiny spring, with a spring constant of 1.20 N/m, will be stretched to what displacement by a 0.0060-N force?
a. 4.2 mm
c. 6.0 mm
b. 5.0 mm
d. 9.4 mm
B
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A satellite is in a circular orbit about the Earth at an altitude at which air resistance is negligible. Which of the following statements is true?
a. There is only one force acting on the satellite. b. There are two forces acting on the satellite, and their resultant is zero. c. There are two forces acting on the satellite, and their resultant is not zero. d. There are three forces acting on the satellite. e. None of the preceding statements are correct.
Deposition of sediment with each new layer younger than the layer below illustrates the principle of
A) original horizontality. B) superposition. C) nonconformity. D) horizontality and nonconformity.
Polonium-215 alpha decays with a half life of 1.8 ms
(a) How much is left after 1. second? (b) What is the daughter nucleus?
Which of the following is not a planar defect?
(a) Edge dislocation (b) Stacking fault (c) Twin (d) Grain boundary