We slowly heat 100 g of water from 5 to 25°C. What is its change in entropy? (For water, c = 4186 kg.)
A. 582 J/K
B. 29.2 K
C. 139 J/K
D. 6.95 J/K
E. 0
F. Other (specify)
B. 29.2 K
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Semiconductors are ‘doped’ because
A. Doping makes them better insulators B. Doping helps to eliminate errors C. Doping decreases the costs D. Doping makes them better conductors
With which of the following observations could Tycho have demonstrated that a comet must be a celestial phenomenon? (Note: you may want to review Ch. 2)
A) from the comet causing a full solar eclipse across much of Europe B) measuring changes in its brightness over time C) parallax measurements from observing it from two locations on Earth
Which of the following is true of Earth's interior?
A) It has a nonmetallic core. B) It has a low-density crust. C) It is geologically inactive. D) It is completely solid.
Metric System: The number 0.00325 × 10-8 cm can be expressed in millimeters as
A. 3.25 × 10-12 mm. B. 3.25 × 10-11 mm. C. 3.25 × 10-10 mm. D. 3.25 × 10-9 mm.