What is the change in entropy of the lead when 2.0 kg of molten lead solidifies? [Data: Lv = 207. kcal/kg at 1744°C; Lf = 5.9 kcal/kg at 328.°C]
What will be an ideal response?
-0.020 kcal/°K
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When we say energy levels in an atom are discrete, we mean that their energy levels are well defined and
A) separate from one another. B) separated by equal energy increments. C) continuous. D) private.
If there around 10,000 transmitting civilizations in the Milky Way, then theoretically the Allen Telescope Array, when it is complete, might be capable of detecting a signal within a few
A) years B) centuries C) months D) decades
________ is the only planet with a mean density less than water
Fill in the blank(s) with correct word
The dynamic random access memory (DRAM) in computers is produced by oxidizing a silicon wafer to produce a capacitor with SiO2 as the dielectric, and the memory corresponds to the charge stored on the capacitor. Assume that the thickness of the dielectric is 1×10-6 m, the plates of the capacitor are square with an edge length of 10×10-6 m, the dielectric constant or relative permeability of SiO2 is 4, and the applied voltage is 10 V.
(a) What is the capacitance? (b) What total charge is stored in this capacitor? (c) What is the charge density on the capacitor plates? (d) What is the polarization of the SiO2 in the capacitor?