meta user
network profile
| bio | website | david.carybros.com |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 2 years, 4 months |
| seen | May 14 at 3:13 | |
| stats | profile views | 118 |
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May 7 |
answered | How can a Human voice or animal voice have unique frequency |
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Jan 9 |
awarded | Necromancer |
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Jan 9 |
awarded | Revival |
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Jan 8 |
answered | Consequences of destroying a space elevator |
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Jan 8 |
comment |
If the earth left the solar system for interstellar space. How long would it take for atmosphere to freeze related: scifi.stackexchange.com/questions/9304/… |
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Jan 7 |
comment |
What are the Constraints on Building a Tower to Space? @AlanSE: I am also mystified by the "1 km thickness". All the references listed at the Wikipedia: space elevator article that I've seen so far seem to assume ribbon of 1 meter wide or less. |
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Jan 7 |
comment |
What are the Constraints on Building a Tower to Space? Yes, your calculation shows that the free breaking length of a constant-cross-section carbon nanotube rope in constant 1g gravity is not quite long enough to reach from geostationary orbit all the way to the surface. However, all modern space elevator designs do not have constant 1g gravity, and are not constant-cross-section -- they are tapered. |
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Jan 6 |
comment |
What are the Constraints on Building a Tower to Space? How are "coal mines" relevant? My understanding is that most carbon nanotubes are produced from ethylene or methane, in turn purified from natural gas. The amount of carbon in a single year's production of ethylene -- 109 million tonnes in 2006 -- is over 4 orders of magnitude more than the 1,500 ton space elevator mentioned in the Space Elevator FAQ, which in turn is about 3 times the 400 ton weight of the international space station. |
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Jan 1 |
answered | Why is an air conditioner more efficient in a low-thermal-mass house? |
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Dec 26 |
comment |
Why is an air conditioner more efficient in a low-thermal-mass house? In principle, that would be relevant if I ever wanted to "reduce the temperature (of the room) by an appreciable amount". However, in practice, every thermostat I've ever seen attempts to keep the temperature (of the room) the same. Or is there some connection between the temperature of the outside air (that the air conditioner cools off and blows into the room) and the thermal mass that I am missing? |
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Dec 26 |
awarded | Critic |
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Dec 26 |
asked | Why is an air conditioner more efficient in a low-thermal-mass house? |
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Oct 22 |
comment |
Would it be possible for geophysicists/geoengineers to develop an artificial way of trapping carbon in the ocean? @annav: Huh? I thought that fish eat plankton. Wouldn't more plankton lead to more or bigger fish (or both)? |
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Oct 8 |
answered | Can 2 beams of ultraviolet light intersect and be visible where they intersect? |
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Oct 2 |
answered | What is the force exerted on a body that doesn't move? |
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Aug 12 |
comment |
Graphene space elevator possible? @AlanSE: To answer your question, space-based solar power uses a "transmission line from GEO to Earth" with a linear density of zero. |
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Aug 9 |
awarded | Student |
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Aug 9 |
asked | How do aerospace engineers choose a landing system? (Curiosity rover) |
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Jun 1 |
revised |
How much energy is in a lightning strike? add direct links to the Wikipedia articles alluded to |
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Jun 1 |
comment |
How much energy is in a lightning strike? related: Can energy be extracted from clouds?. |
