Liquid mercury is contained in a lead beaker as shown in Figure 1-14. Estimate the amount of mercury that migrates by diffusion into the beaker after 48 hours if the concentration of mercury is 2% at a distance 0.01 cm into the beaker wall from the inside surface. Assume that the system is at 20ºC and neglect evaporation to air.
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What isotopes are used as nuclear reactor fuel?
a. uranium-235 b. uranium-238 c. plutonium-239 d. deuterium
Why does Earth have so little carbon dioxide in its atmosphere compared to Venus?
A) Earth has just as much carbon dioxide as Venus, but most of it is locked up in carbonate rocks rather than being free in the atmosphere. B) Earth's volcanoes outgassed far less carbon dioxide than those on Venus. C) Earth once had a lot of carbon dioxide, but it was lost to space during the heavy bombardment early in our solar system's history. D) Chemical reactions turned Earth's carbon dioxide into nitrogen.
In the water flow analogy with an electric circuit the pressure in the fluid circuit is analogous to ________ in the electric circuit.
Fill in the blank(s) with the appropriate word(s).
There is only one form of neutrino
a. True b. False Indicate whether the statement is true or false