منابع مشابه
Commensurability and the character variety
Recall that hyperbolic 3-manifolds M and N are said to be commensurable if they have a common finite sheeted covering. This is equivalent to the fundamental groups having subgroups of finite index which are conjugate in PSL(2,C). In general it is very difficult to determine if two manifolds are commensurable or not, once the most obvious invariants of commensurability (for example, the invarian...
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This article presents a transient model of a solar adsorption cooling system. A computer program has been developed to simulate the operation of a two bed silica gel- water adsorption cooling system as well as flat plate collectors and the hot water storage tank. This program is then utilized to simulate the performance of a sample solar adsorption cooling system used for cooling a set of r...
متن کاملQ in the Solar System
Secular changes brought about by tidal friction in the solar system are reviewed. The presence or absence of specific changes is used to bound the values of Q (the specific dissipation function) appropriate for the planets and satellites. It is shown that the values of Q separate sharply into two groups. Values in the range from 10 to 500 are found for the terrestrial planets and satellites of ...
متن کاملLife in the solar system.
Life, defined as a chemical system capable of transferring its molecular information via self-replication and also capable of evolving, must develop within a liquid to take advantage of the diffusion of complex molecules. On Earth, life probably originated from the evolution of reduced organic molecules in liquid water. Organic matter might have been formed in the primitive Earth's atmosphere o...
متن کاملIce in the solar system
Ice is ubiquitous in the solar system; it is also a substance with a fascinatingly complex set of transitions between its multiple forms. Here I review what is known of the various crystalline and amorphous phases of ice, and of their presence on different solar system bodies,
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ژورنال
عنوان ژورنال: Physics Essays
سال: 2009
ISSN: 0836-1398
DOI: 10.4006/1.3223843