EdEarl

NASA used some really good ceramic insulators on the space shuttle. They were full of air bubbles and very light weight. You might be able to make a ceramic using cement, sand and soda water that will allow you to do your 195 degree thing. There is no way to keep the oval from heating some, but a ceramic insulator is your best chance, IMO. The ceramic needs to have many small cavities, and IDK if it can be done with cement. A filler with smaller particles than sand would probably work better, too.

"Be careful what you wish for in life. It might not turn out how you think." ... unknown author

arc, Just put hot water into a cup and put a coin (copper, nickle, silver, or gold) or a ring (copper, silver, gold) into the water, holding it with your fingers, and see if it gets cold or hot (finger thermometer). Do the same with a bit of aluminum from a can. Lots of kinds of plastic are available around the house, also glass and wood from a tree or bush.

Great idea. I hope they have better luck than the Kepler space telescope.

The people of Tuvalu would be happier if we had not found additional reserves, and I fear humanity will soon come to the same conclusion. It is sad that economic partial solutions have existed for a very long time. Jimmy Carter put solar panels on the White House, Regan removed them (why?). Solar thermal heating for houses and hot water plus good insulation are less expensive than paying for energy to heat the house and water over life span of a house. Why haven't we done it?

I googled "common misconceptions optics" and got many hits, and the same for mechanics. I personally doubt 1 in 100 people can name the simple machines, name the primary (additive and subtractive) colors, or know how many colors are in a rainbow.

Have you studied the definitions: http://en.wikipedia.org/wiki/Mole_fraction http://en.wikipedia.org/wiki/Molecular_mass

Sorry, my memory played tricks on me. Skinner called it superstitions conditioning, not religious conditioning, and used pigeons, not chickens. See: http://en.wikipedia.org/wiki/B._F._Skinner#Superstitious_Pigeons

You haven't explained what i, j an k represent. I assume they are subscripts of three different kinds of things that may be put into the knapsack. Suppose there are M things that may be put in the knapsack, and there are differing amounts of each of the M things, i.e., nM. When M > 3, you need subscripts i, j, k, l, ..., and loops for each one. If M and nM are large enough, not even the fastest super computers can solve the problem quickly.

I think philosophy is good. In subtle ways, my wife became more interesting after she took logic and philosophy classes.

Stephen Hawking thinks time travel to the past is impossible, see: http://www.youtube.com/watch?v=sUqxzH0652w. Of course, we do travel into the future, and can change the rate at which we do so in several ways (e.g., spending time in space on the ISS).

Historically, social investment by religious people has increased their following, for example http://www.youtube.com/watch?v=1BBJ1U9WlJE.

arc, What thing you hold in hot water will become cold?

According to Dr. Stephen Devries the Mediterranean Diet reduces the risk of heart disease by 74% and reduces the risk of asthma 72% when their mother is on a Mediterranean Diet during pregnancy. See video:

From wikipedia: "The strong fields of magnetars are understood as resulting from a magnetohydrodynamic dynamo process in the turbulent, extremely dense conducting fluid that exists before the neutron star settles into its equilibrium configuration. These fields then persist due to persistent currents in a proton-superconductor phase of matter that exists at an intermediate depth within the neutron star (where neutrons predominate by mass). A similar magnetohydrodynamic dynamo process produces even more intense transient fields during coalescence of pairs of neutron stars." http://en.wikipedia.org/wiki/Magnetar#Origins_of_magnetic_fields http://www.the-electric-universe.info/printings/electric_magnetars.html

IQ measurement was developed to predict the performance of students in school. There may be other kinds now, IDK, but I doubt they have one to measure how IQ affects ones chance to be selected by evolution, which seems to be a requirement to tell whether IQ has changed due to evolutionary causes in the recent past.

Stress releases hormones that can suppress an immune system make an individual susceptible to infection. If the infection is viral, it may result in DNA change (See: http://www.sciencedaily.com/releases/2010/01/100107103621.htm). A person can choose to do things that are stressful. Thus, it is not totally unreasonable that a person may do something to change their DNA, and perhaps alter evolution. Unless I am missing something.

I seem to have found a contradiction about magnetars in Wikipedia. It says that a magnetar is a neutron star. The description of a neutron star says they contain only neutrons. However, the description of a magnetar says it contains protons. Additionally, is a magnetar and the space around it (if filled with electrons) anything like a super massive atom? Since I have not seen such a description, perhaps electrons around a magnetar are not in orbitals? If not, why have they not been pulled into the magnetar and made the magnetar charge zero? Maybe the electrons are in an accretion disk, and eventually they will fall into the magnetar, except the magnetic fields might pull the electrons out of an accretion disk. Can someone teach me a bit more about magnetars without delving into a lot of math, and provide references that include math? tyvm

I believe your interpretation is more or less correct. Astronomers can only view objects in our universe, out to about 13.72 billion years. But, everywhere they look, the universe is not only receding; it is accelerating. Their conclusion is that the universe will continue to recede forever (whatever that means) towards infinite size (whatever that means). Moreover, they conjecture that running time backward would result in the universe becoming smaller and smaller until it becomes a point of energy; thus, they conclude a big bang started the universe. And, math suggests this story of the universe is correct. Evidence of a multiverse is limited. Since the universe appears to be infinitely large and perhaps infinitely old (a contradictory idea see below), that an infinite number of universes similar to (or radically different from) ours may have banged into existence. An infinitely old universe is contradictory because scientists agree that the big bang created both space and time; thus, the idea of infinite age of the multiverse is strange. But, infinity is a strange idea. Upon rereading your post, found your question of "existence itself" is not addressed in my first post. Observations of the Universe expansion accelerating have been formalized mathematically as an energy that stretches space-time. Moreover, virtual particles with antiparticles pop into existence and annihilate. Scientists believe the same energy that causes the Universe to expand creates virtual particles, and is the energy source of the big bang. However, science can only observe, and explain what has been observed. It cannot answer metaphysical questions.

Oil energy is used for both stationary and mobile applications. There are a variety of energy resources that can replace oil for one or the other application. They include energy from PV, windmill, updraft towers, downdraft towers, solar ponds, geothermal, radioactive decay, fission, fusion, tidal, wave, ocean thermal, biodiesel, ethanol, batteries, hydrogen, cellulose pellets, direct solar heating (active and passive), and last but not least coal. Direct solar heating is one that is relatively inexpensive to build into new homes and other buildings, and IMO should be mandatory, both for heating water and interior spaces. See: http://earthship.com/

I do not like this Topic Title because it is inaccurate; whereas, and my experience as a programmer has taught precision is crucial. But, after considering the purpose of a title, and wrestling with my language limitations (I am far from being a poet), I decided to use it, because a title needs to engage an audience, as science education for 13 year old brains need to engage its intended audience and must sometimes sacrifice accuracy to do so. See this video:

I mentioned spiritual because some people believe consciousness is not part of the brain or its processes. I use Firefox, and for a while had no spell check in this forum, but spell check started working, why??? People who post here do not post on every thread. Do not take it personally. They merely like some topics and not others. Enjoy

Hi, welcome to the forum. I did not see your original post, but did participate in the following: http://www.scienceforums.net/topic/75095-consciousness-constructing-reality/ My orientation is generally scientific; thus, cannot comment on philosophical or spiritual aspects of mind and consciousness.

"noticed"...just trying to keep it simple for the OP. Changed to "effect to be significant compared to the rest airplane mass" for swansont. I am not an expert, obviously, but not uneducated either. I hope we do not overwhelm the OP with nuance. I would prefer starting another thread for my education.