What is the significance of the circular region marked in the image (with location identified on the map)?
A) It outlines the crater from the impact thought to have killed off the dinosaurs.
B) It shows where the coastline of Mexico was located 65 million years ago.
C) It shows the outline of the oldest known impact crater on Earth.
D) Its colors indicate the ocean depth within the circle.
A) It outlines the crater from the impact thought to have killed off the dinosaurs.
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The amplitude of a system moving with simple harmonic motion is doubled. The total energy will then be
A. 4 times as large. B. 3 times as large. C. 2 times as large. D. the same as it was. E. half as much.
A sample of blood is placed into a centrifuge of radius 15.0 cm. The mass of a red corpuscle is 3.0 × 10^?16 kg, and the centripetal force required to make it settle out of the plasma is 4.0 × 10^?11 N. At how many revolutions per second should the centrifuge be operated?
A person with normal eyesight uses a converging lens of focal length 10 cm as a magnifying glass to finish an engraving job. To see detail, he holds the lens very close to his eyes. At what minimum distance from the job must he hold the lens?
A) 20 cm B) 30 cm C) 14 cm D) 9.4 cm E) 7.1 cm
To demagnetize a ferromagnetic metal, heat it to above the _________temperature in the absence of a magnetic field.
Fill in the blank(s) with the appropriate word(s).