The ceramic that is used as a spark-plug insulator in gasoline engines is _________.
Fill in the blank(s) with the appropriate word(s).
alumina
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Uncertainty Principle Using Momentum and Position: If the maximum possible accuracy in measuring the position of a particle increases, the maximum possible accuracy in measuring its velocity will
A. increase. B. decrease. C. not be affected.
Melanie says that when a diver enters an underwater cave of height y, the pressure on her is no greater than ?Wgy. Rosalind says that if the bottom of the cave is a distance Y below the water surface, the pressure on the soles of the diver's feet can reach ?WgY. Which one, if either, is correct? (The density of water is ?W.)
A. Melanie, because the roof of the cave absorbs the water pressure from above. B. Melanie, because only the fluid directly above any volume of the fluid can contribute to the pressure on that volume. C. Rosalind, because a fluid exerts equal pressure in all directions at a given depth. D. Rosalind, because the pressure also depends on ?c, density of the material above the cave roof, so that p =?cg(Y-y) +rWgy. E. Melanie, because the pressure equals p = ?WgH??cg(H?h).
When considering human metabolism in terms of the 1st law of thermodynamics, which of the following represents the metabolic rate?
a. ?U / ?t b. ?Q / ?t c. W / ?t d. ?W / ?t
The binding energy per nucleon of a nucleus
A) increases steadily as we go to heavier elements. B) is approximately constant throughout the periodic table, except for very light nuclei. C) has a maximum near iron in the periodic table and decreases after that for heavier elements. D) decreases steadily as we go to heavier elements. E) has a minimum near iron in the periodic table and increases after that for heavier elements.