A Quote by Elon Musk
I realized that a methane-oxygen rocket engine could achieve a specific impulse greater than 380.
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If you think about the energy that a rocket engine has to put out and all the fuel and you're sitting on top of like a bomb. And on the Space Shuttle, that big orange tank is filled with liquid hydrogen and liquid oxygen, the white cell rocket boosters on the sides are filled with solid propellant. There's a lot of energy in all those chemicals there and you've got to control it in a way so it doesn't explode. So, there's a lot of plumbing, a lot of valving, a lot of control systems, and it's a very complicated thing. So, how do you bring the price of that down?
The creative impulse can be killed, but it cannot be taught. What a teacher can do... in working with children, is to give the flame enough oxygen so that it can burn. As far as I'm concerned, this providing of oxygen is one of the noblest of all vocations.
Since we want not emancipation from impulse but clarification of impulse, the duty of rhetoric is to bring together action and understanding into a whole that is greater than scientific perception.
Apart from the obvious advantages of having ice to melt, filter, then drink, you can also break apart the water's hydrogen from its oxygen. Use the hydrogen and some of the oxygen as active ingredients in rocket fuel and keep the rest of the oxygen for breathing. And in your spare time between space missions, you can always go ice skating on the frozen lake created with the extracted water.
A lot of the progress in machine learning - and this is an unpopular opinion in academia - is driven by an increase in both computing power and data. An analogy is to building a space rocket: You need a huge rocket engine, and you need a lot of fuel.
Indeed the early history of rocket design could be read as the simple desire to get the rocket to function long enough to give an opportunity to discover where the failure occurred. Most early debacles were so benighted that rocket engineers could have been forgiven for daubing the blood of a virgin goat on the orifice of the firing chamber.
What a photograph shows us is how a particular thing could be seen, or could be made to look - at a specific moment, in a specific context, by a specific photographer employing specific tools.
It's not that bullying is any worse today. The impulse for cruelty is the same impulse. The only difference is that the tools to achieve that have become more sophisticated.
Of course methane is a fossil fuel, but as long as it is burned efficiently and fugitive emissions of methane gas are minimised, it is a less harmful fossil fuel than coal and oil and is an important way-station on the global journey towards low-carbon energy.
Character robotics could plant the seed for robots that actually have empathy. So, if they achieve human level intelligence or, quite possibly, greater than human levels of intelligence, this could be the seeds of hope for our future.
As long as I can remember I feel I have had this great creative and spiritual force within me that is greater than faith, greater than ambition, greater than confidence, greater than determination, greater than vision. It is all these combined. My brain becomes magnetized with this dominating force which I hold in my hand.
I remember in 1967, when there was that terrible fire on NASA's Apollo 1 rocket that killed three astronauts, my father made pure oxygen and we lit this tiny cup and burned it. Suddenly, we had an unbelievable jet and a fire. You just could see exactly what had happened.
Soils could also be giving up their carbon stores: evidence emerged in 2005 that a vast expanse of western Siberia was undergoing an unprecedented thaw. The region, the largest frozen peat bog in the world, had begun to melt for the first time since it formed 11,000 years ago. Scientists believe the bog could begin to release billions of tonnes of methane locked up in the soils, a greenhouse gas 20 times more potent than carbon dioxide. The World Meteorological Organisation recently reported the largest annual rise of methane levels in the atmosphere for a decade.
For a Westerner to trash Western culture is like criticizing our nitrogen/oxygen atmosphere on the grounds that it sometimes gets windy, and besides, Jupiter's is much prettier. You may not realize its advantages until you're trying to breathe liquid methane.
Donald Trump can, for example, imply the threat that federal business will be withheld from some of companies. That's possibly dangerous precedent. You know what I mean? When - the Pentagon has very specific guidelines, for example, when it goes out and does procurement. You don't want them buying a jet engine which is actually inferior to another jet engine simply because that other company outsourced some jobs. The final thing that Trump could do is he could impose tariffs on any products that are imported once they have been outsourced to another country.
Because nitrous oxide [released by nitrate-fertilised soil] is 296 times stronger than CO? at global warming and methane [cow farts] is about 26 times as potent as CO?, the combined greenhouse effect of our livestock worldwide is greater than the sum total of all the cars, trains, busses, trucks, ships, airplanes and jets.
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