Which of the following was the most perfect region according to Aristotle's philosophy?
A) The center of the Sun
B) The heavens
C) Earth's surface
D) Earth's center
B
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Potential: A proton that is initially at rest is accelerated through an electric potential difference of magnitude 500 V. How much kinetic energy does it gain? (e = 1.60 × 10-19 C)
A. 500 J B. 8.0 × 10-17 J C. 1.6 × 10-19 J D. 800 J
In light of what we know about geological activity on the terrestrial worlds, why might it seem surprising to find geological activity on jovian moons?
a. because some of them have orbital resonances with other moons b. because they rotate slowly c. because they are relatively small in size d. because they are moons, not planets e. because they are far from the Sun
Most of the key energy-generating chemical reactions used by life on Earth are
A) rearrangement reactions B) redox reactions C) decomposition reactions D) combination reactions
An object is thrown upwards with a speed of 14 m/s. How high above the projection point is it after 0.50 s?
A) 0 m B) 2.9 m C) 5.8 m D) 7.0 m E) 8.2 m