What does the principle of superposition say about the ages of rocks?
What will be an ideal response?
Answer: The oldest rock in any undeformed sequence of rocks will be the rock on the bottom.
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The Milky Way and the Milky Way Galaxy are the same thing
a. True b. False Indicate whether the statement is true or false
Which of the following has virtually no effect on the internal structure of a planet?
A) its size B) its composition C) its magnetic field D) its mass
Nineteenth-century scientists thought the "ether" to be
A) the cause of the gravitational force. B) the medium for the propagation of light waves. C) the medium for the propagation of sound waves. D) All of the above. E) None of the above.
A microscope has an objective lens with an aperture of diameter 0.60 cm where a monochromatic light source of wavelength 580 nm is used to illuminate the object. It is determined that the minimum angle of resolution is 1.18 × 10^-4 rad. If the illuminating source were replaced by a source of wavelength 700 nm, what would the minimum angle of resolution now become? (1 nm = 10-9 m)
a. 0.58 × 10^-4 rad c. 0.85 × 10^-4 rad b. 1.4 × 10^-4 rad d. 1.2 × 10^-4 rad