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
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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.
Each note on a piano keyboard has its own
A) pitch. B) loudness. C) wavelength. D) amplitude. E) none of the above
How many significant figures are in 0.0037010?
A) four B) five C) six D) seven E) eight
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