On average, approximately how fast do plates move with plate tectonics on Earth?

A) a few centimeters per year
B) a few millimeters per century
C) a few centimeters per century
D) They do not move at all, except during earthquakes.
E) a few kilometers per hour


A) a few centimeters per year

Physics & Space Science

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If a wave has a frequency of 8 Hz, it has a period of _______.

a. 1/8 s. b. 8.5 s. c. 8 s. d. 4 s.

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How many significant figures are in 0.0037010?

A) four B) five C) six D) seven E) eight

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A small sphere with a mass of 441 g is moving upward along the vertical +y-axis when it encounters an electric field of 5.00 N/C

If, due to this field, the sphere suddenly acquires a horizontal acceleration of 13.0 m/s2 , what is the charge that it carries? A) 1.15 C B) -1.15 C C) 1150 C D) -1150 C

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Each note on a piano keyboard has its own

A) pitch. B) loudness. C) wavelength. D) amplitude. E) none of the above

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