Entropy: What is the change in entropy of the ice when a 0.050-kg ice cube at 0°C melts? The latent heat of fusion for water is 80 cal/g.
Fill in the blank(s) with the appropriate word(s).
15 cal/K
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What holds the Sun together?
A. its gravitational force B. gas pressure. C. electrostatic forces between ions in its interior D. Nothing, the Sun is actually expanding very slowly.
Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground with 100 J of kinetic energy. If he were to instead throw the ball straight upward, it will soon reach the ground with a kinetic energy of
A) less than 100 J. B) 100 J. C) more than 100 J.
Like other solid bodies in the solar system, Earth's surface was kept molten by
A) radioactivity. B) differentiation. C) convection. D) bombardment by small bodies. E) the solar nebula.
Which of the following statements best describes the line of stability?