An unconformity is
A) a scientific debate between Earth scientists.
B) when younger igneous plutonic rocks are above older sediments.
C) a continuous sequence of sedimentary layers.
D) a gap in an otherwise continuous time-sequence of rock layers.
Answer: D
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The maximum magnification of a typical light optical microscope is
(a) 100,000 times (b) 10,000 times (c) 1000 times (d) 100 times
A change in pressure at any point in a confined fluid at rest is transmitted
A) undiminished to all points in the fluid. B) to points of lower pressure. C) in the direction of lower energies. D) all of the above E) none of the above
Radio astronomers face a problem of radio interference analogous to light pollution
Indicate whether the statement is true or false
A 2.00-kg copper rod is 40.00 cm long at 23°C. If 50,000 J are transferred to the rod by heat, what is its change in length? (ccopper = 387 J/kg•°C and acopper = 17 × 10^–6/°C)
a. 0.022 cm c. 0.055 cm b. 0.044 cm d. More information is needed.