The geocentric model of the Greeks consisted of a
A) flat Earth at the center of the universe surrounded by a dome-shaped sky
B) flat Earth at the center of the universe surrounded by a celestial sphere
C) spherical Earth at the center of the universe surrounded by a dome-shaped sky
D) spherical Earth at the center of the universe surrounded by a celestial sphere
D
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Two velocity vectors are added: one of magnitude 2.0 m/s and one of magnitude 4.0 m/s. Not knowing the respective directions, we can say that the magnitude of the sum of the vectors will be
A. less than 2.0 m/s. B. between 6.0 m/s and 4.0 m/s. C. 2.0 m/s. D. 6.0 m/s. E. between 6.0 m/s and 2.0 m/s.
In an inertia balance, a body supported against gravity executes simple harmonic oscillations in a horizontal plane under the action of a set of springs. If a 1.00 kg body vibrates at 1.00 Hz, a 2.00 kg body will vibrate at
a. 0.500 Hz. b. 0.707 Hz. c. 1.00 Hz. d. 1.41 Hz. e. 2.00 Hz.
A metal block sits on top of a floating wooden block. If the metal block is suspended from the bottom of the wooden block, what happens to the volume of the wooden block that is submerged in the water?