Actually, ethanol is highly corrosive, and as such most flex-fuel vehicles have much more stainless steel parts (hence the extra expense). A few other disadvantages are that ethanol is ruined if mixed with water, ethanol tends to grow mold, and ethanol has a much lower energy density than gasoline.
I don't understand why they're not using the algae for biodisesel instead of crappy ethanol.
They are also truly asking about how massive is a petabyte, for if you fill enough hard drives with helium, surely a petabyte's weight could be negative, or if you set up a datacenter on the moon, the weight would surely be less.
Umm the only problem with that scheme is that you'd better hope that the temperature and gravitational constant don't change before you go to retrieve that data. Any change in temperature or stress (even due to self weight) will change the length of that steel bar.
Too bad a lot of the crap I have to install to use my computer to do stuff. I'm looking specifically at YOU ADOBE! I don't want increasingly annoying notifications to tell me to update Adobe Reader, nor do I want you to make me go through and delete a billion shortcuts again because your updater conveniently noticed that they were gone and decided to replace them without asking. Oh, and it also noticed that I don't have their software loading at bootup, so they make sure to reinstate that without telling me as well. Oh how I wish there was a decent replacement for Adobe Reader.
There are a ton of programs out there that are legit and you have to use most of the time. Those programs like to needlessly start at bootup, eating up resources while doing nothing, and spreading shortcuts and files all around your system like it's raining on your hard drive.
For some reason, this isn't a problem with Linux (specifically Ubuntu, but relevant to others as well) where one central repository controls the majority of software and installs, updates, and removes it simply and completely. Compare that to.exe and.msi packages that all are different and like to spread files wherever they please with or without user permission. I'll take Apt over downloading.exe packages all day long.
Sun, FYI, you're not off the hook for the hell that is Java.
The problem is not the amount of force imparted. There are two failure options: 1. The stress exceeds what the material can bear which causes it to crack. 2. The impulse exceeds what the material can bear which causes it to shatter.
The first option is similar for the thawed and frozen chickens. The thawed chicken will spread out more imparting slightly less stress over the glass, but you can tell from the high speed that this wasn't the failure method.
The second option is what matters more for glass. It's not the stress (or force) you impart, it's how fast that stress is applied (called impulse). The glass cannot transfer the load fast enough which causes the material to shatter. In this case, the frozen chicken is in contact with the glass a much shorter time than the thawed chicken (because the frozen chicken will stay intact). Thus the impulse is much higher. For a physics explaination, try hitting yourself on the head with two bats, one metal and one wood. If the wood one breaks at the same speed as the metal one stays intact, the metal one will exert the same force as the wood on initial contact, but the wood will exert much less impulse.
That makes me miss my old AT keyboard that came with my 486 packing Gateway 2000. It had a full square of arrow buttons including the diagonal directions and a space key in the middle. I used that keyboard exclusively when I played Star Wars Galaxies, mainly because of the extra set of F keys on the side that I could remap to give me a total of 24 hotkeys.
Adam and Jamie revisited that one after they found that the windshield they used wasn't rated for bird strikes. After the revisit, they did prove that thawed chickens did not penetrate as far as frozen ones. See episode 14 from the 2004 season.
Actually crude oil makes darn good plant food. Coal not so much, mainly because it's rock, and the plants can't readily extract the nutrients from it. One species poison is another's food.
I don't know where you are getting your peak oil ideas are coming from... Maybe you should do some more research: http://www.api.org/aboutoilgas/upload/truth_primer.pdf (sorry about the PDF). Peak oil predictions always seem to be based on current reserves. Technology to explore new fields and to access previously unavailable sources will easily match the pace of increased demand for quite a while.
I agree with your nuclear point. It makes sense for stationary power plants, but until you get a reactor the size of a car engine, it won't work for transportation. In the meantime, we need oil and gas. The cap and trade bill will increase the cost of everything, and the only people who win are the politicians.
The real difference is whether you use fractions or decimals. The SI units are all made for decimals. The Imperial units are all based on fractional relationships. There are 12 inches in a foot because 12 evenly divides by 2,3,4,and 6. As opposed to a meter only evenly divides into cm if you use 2 or 5. Depending on the application, different systems can be more precise. For example, if you needed three evenly sized pieces out of a foot, they'd be 4" each. If you needed 3 evenly sized pieces out of a meter, you'd end up with 33.33333333333etc cm.
As far as which is actually easier to use, it depends on what you learn growing up. If someone told me somethings weight in kilograms, or correctly in newtons, I have no idea of the scale until I convert to pounds. As an engineer, intuition is a huge aid, and if you can't grasp scale, you might as well do everything mathematically anyway.
As a civil engineer, I feel a strange need to point out that you're not technically correct... You do need to have a pump powerful enough to prevent the absolute pressure in the system from dropping below the vapor pressure of water or you get cavitation. FYI, the vapor pressure of water on a hot day (assuming CA, so we'll say 100 degrees F) is about.85 psi. Atmospheric pressure at sea level is approximately 14.7 psi. So you have approximately 13.8psi to play with which amounts to about 32 feet above which would require a pump to keep your water liquid (assuming no pressure loss in the pipe). Below that, you're correct, you just need a pump to overcome friction losses.
You're going to be waiting for awhile... My problem with the climate change fearmongering is that there isn't enough data to predict the climate, and there won't be for a long time. 10 years proves nothing on a climate scale. Heck the maybe 1000 years of good temperature data isn't worth much either.
I hate to tell the climate scientists, but the earth's climate changes... It did long before humans lived, and it likely will continue now that humans are here. That's the key. The climate changes. Whether we are affecting it is moot because someday, it's going to get colder or warmer without our help. Quite frankly, if we are causing the world to get warmer, I sleep a lot better at night.
Global warming might cause some additional severe weather, maybe some flooding along the coastlines, heaven forbid some polar bears die. But if global cooling occurs, most of us here in the northern US are going to be under 500 feet of ice... The moral of the story is, warm weather on earth is much more life supporting than cold. The earth won't get as hot as Venus, it will only get about as hot as the cretaceous period, which supported more life than any other time we know of.
To sum this up, I'd rather be farming in Siberia with New Orleans under water, than have to live in Mexico because a large portion of every continent is under glaciers.
You're not a hypocrite... Because a usage fee for TV would probably be minute based, not bandwidth based. And I'm pretty sure people would get upset if they included commercial time in the usage count.
Oppose that with Time Warner's plan... They charge you for bandwidth. So when you navigate to a page to get approximately 20 bytes of useful information, but the website has a bunch of flash animations that order on several megabytes, that's when I get pissed off. When all website go back to Plain Jane HTML and don't waste bandwidth, then maybe I won't be upset about paying per gigabyte. Until then, either charge me by the minute, or charge me a flat rate for unlimited.
Umm, have you ever seen what goes into asphalt? Limestone is frequently used as an aggregate. All the aggregate is sand and gray gravel... Asphalt cement is black, and will turn anything it touches black. Good luck finding some white asphalt.
Not just quick dry... All cement is an exothermic reaction. And would people SERIOUSLY stop calling concrete cement. Roads are made of concrete, which is a mixture of cement, aggregate, and water. Cement is only the binder of the mix.
Umm, Jet fuel is less refined than diesel or gasoline (using less refined to mean heavier oil, as the grandparent did)... Jet fuel is #1 fuel oil, and Diesel is #2. Jet fuel and diesel both have a higher energy density (more energy per unit volume) than gasoline. Thus there is more energy in a gallon of jet fuel or diesel than gasoline. That is in addition to the extra efficiency due to the higher compression ratios in diesel engines... But the jet fuel is a whole new ballgame because it's a turbine engine, not an internal combustion engine, thus being more efficient from the get go.
You don't listen very well. Architects do NOT design buildings for strength. I don't know what the laws are in New York, but no structure built for public occupancy can be built unless the structural plans are stamped by a registered civil engineer in my state. Architects take a lot of art and drawing classes, but I have never seen one in a steel design course.
Secondly, no there is no plane load in ASCE 7 (the reference manual where load configurations are designed). I would really like to see a citation about the Empire State Building being designed for that. Any earthquake or wind load easily surpasses a plane impact in severity. Thus buildings will survive a plane impact. Also, the structural engineer probably doesn't design the fireproofing either. A separate (probably mechanical) engineer probably designed the fire suppression system and/or fireproofing on the building. And I do agree, he probably didn't take into account burning jet fuel in the design.
Engineers plan for the unexpected, but you can't plan for everything. We try to account for normal use and reasonable natural disasters, but if we try to design buildings to withstand all the horrors humanity can throw at it, nothing would ever get built.
1st: Architects don't design buildings for strength... They design buildings for art and function. Civil engineers design a building for the loads applied to it.
2nd: In no way do civil engineers design for plane impact loads. I'm not saying a building wasn't designed to handle loads that a plane might put on a building, but the lateral loads that a civil engineer takes into account are wind and seismic loads. But like I said, a plane is more likely to inflict less load than a typical earthquake. However, sustained fire damage is what brought down the twin towers, not the direct force of the planes.
The problem in your logic is that people won't be looking for somewhere else to live. The people will be whining to the government to create a way for them to live beneath sea level at the expense of all the people who don't live near the ocean.
Too bad our campus used Novell's Iprint, which despite Novell being Linux friendly, doesn't work under linux, or actually just about any computer not running 32bit XP or Vista. They do this because printing costs 10c per page.
Gee, printing used to be free, and there used to be computer labs... Both are gone now, but tuition still goes up 8-10% a year. Where did the savings go?
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Actually, ethanol is highly corrosive, and as such most flex-fuel vehicles have much more stainless steel parts (hence the extra expense). A few other disadvantages are that ethanol is ruined if mixed with water, ethanol tends to grow mold, and ethanol has a much lower energy density than gasoline.
I don't understand why they're not using the algae for biodisesel instead of crappy ethanol.
As long as my mail doesn't come covered in hot grits...
They are also truly asking about how massive is a petabyte, for if you fill enough hard drives with helium, surely a petabyte's weight could be negative, or if you set up a datacenter on the moon, the weight would surely be less.
Umm the only problem with that scheme is that you'd better hope that the temperature and gravitational constant don't change before you go to retrieve that data. Any change in temperature or stress (even due to self weight) will change the length of that steel bar.
Too bad a lot of the crap I have to install to use my computer to do stuff. I'm looking specifically at YOU ADOBE! I don't want increasingly annoying notifications to tell me to update Adobe Reader, nor do I want you to make me go through and delete a billion shortcuts again because your updater conveniently noticed that they were gone and decided to replace them without asking. Oh, and it also noticed that I don't have their software loading at bootup, so they make sure to reinstate that without telling me as well. Oh how I wish there was a decent replacement for Adobe Reader.
There are a ton of programs out there that are legit and you have to use most of the time. Those programs like to needlessly start at bootup, eating up resources while doing nothing, and spreading shortcuts and files all around your system like it's raining on your hard drive.
For some reason, this isn't a problem with Linux (specifically Ubuntu, but relevant to others as well) where one central repository controls the majority of software and installs, updates, and removes it simply and completely. Compare that to .exe and .msi packages that all are different and like to spread files wherever they please with or without user permission. I'll take Apt over downloading .exe packages all day long.
Sun, FYI, you're not off the hook for the hell that is Java.
The problem is not the amount of force imparted. There are two failure options:
1. The stress exceeds what the material can bear which causes it to crack.
2. The impulse exceeds what the material can bear which causes it to shatter.
The first option is similar for the thawed and frozen chickens. The thawed chicken will spread out more imparting slightly less stress over the glass, but you can tell from the high speed that this wasn't the failure method.
The second option is what matters more for glass. It's not the stress (or force) you impart, it's how fast that stress is applied (called impulse). The glass cannot transfer the load fast enough which causes the material to shatter. In this case, the frozen chicken is in contact with the glass a much shorter time than the thawed chicken (because the frozen chicken will stay intact). Thus the impulse is much higher. For a physics explaination, try hitting yourself on the head with two bats, one metal and one wood. If the wood one breaks at the same speed as the metal one stays intact, the metal one will exert the same force as the wood on initial contact, but the wood will exert much less impulse.
That makes me miss my old AT keyboard that came with my 486 packing Gateway 2000. It had a full square of arrow buttons including the diagonal directions and a space key in the middle. I used that keyboard exclusively when I played Star Wars Galaxies, mainly because of the extra set of F keys on the side that I could remap to give me a total of 24 hotkeys.
Adam and Jamie revisited that one after they found that the windshield they used wasn't rated for bird strikes. After the revisit, they did prove that thawed chickens did not penetrate as far as frozen ones. See episode 14 from the 2004 season.
Actually crude oil makes darn good plant food. Coal not so much, mainly because it's rock, and the plants can't readily extract the nutrients from it. One species poison is another's food.
Umm citation needed?
I don't know where you are getting your peak oil ideas are coming from... Maybe you should do some more research: http://www.api.org/aboutoilgas/upload/truth_primer.pdf (sorry about the PDF). Peak oil predictions always seem to be based on current reserves. Technology to explore new fields and to access previously unavailable sources will easily match the pace of increased demand for quite a while.
I agree with your nuclear point. It makes sense for stationary power plants, but until you get a reactor the size of a car engine, it won't work for transportation. In the meantime, we need oil and gas. The cap and trade bill will increase the cost of everything, and the only people who win are the politicians.
The real difference is whether you use fractions or decimals. The SI units are all made for decimals. The Imperial units are all based on fractional relationships. There are 12 inches in a foot because 12 evenly divides by 2,3,4,and 6. As opposed to a meter only evenly divides into cm if you use 2 or 5. Depending on the application, different systems can be more precise. For example, if you needed three evenly sized pieces out of a foot, they'd be 4" each. If you needed 3 evenly sized pieces out of a meter, you'd end up with 33.33333333333etc cm.
As far as which is actually easier to use, it depends on what you learn growing up. If someone told me somethings weight in kilograms, or correctly in newtons, I have no idea of the scale until I convert to pounds. As an engineer, intuition is a huge aid, and if you can't grasp scale, you might as well do everything mathematically anyway.
As a civil engineer, I feel a strange need to point out that you're not technically correct... You do need to have a pump powerful enough to prevent the absolute pressure in the system from dropping below the vapor pressure of water or you get cavitation. FYI, the vapor pressure of water on a hot day (assuming CA, so we'll say 100 degrees F) is about .85 psi. Atmospheric pressure at sea level is approximately 14.7 psi. So you have approximately 13.8psi to play with which amounts to about 32 feet above which would require a pump to keep your water liquid (assuming no pressure loss in the pipe). Below that, you're correct, you just need a pump to overcome friction losses.
You're going to be waiting for awhile... My problem with the climate change fearmongering is that there isn't enough data to predict the climate, and there won't be for a long time. 10 years proves nothing on a climate scale. Heck the maybe 1000 years of good temperature data isn't worth much either.
I hate to tell the climate scientists, but the earth's climate changes... It did long before humans lived, and it likely will continue now that humans are here. That's the key. The climate changes. Whether we are affecting it is moot because someday, it's going to get colder or warmer without our help. Quite frankly, if we are causing the world to get warmer, I sleep a lot better at night.
Global warming might cause some additional severe weather, maybe some flooding along the coastlines, heaven forbid some polar bears die. But if global cooling occurs, most of us here in the northern US are going to be under 500 feet of ice... The moral of the story is, warm weather on earth is much more life supporting than cold. The earth won't get as hot as Venus, it will only get about as hot as the cretaceous period, which supported more life than any other time we know of.
To sum this up, I'd rather be farming in Siberia with New Orleans under water, than have to live in Mexico because a large portion of every continent is under glaciers.
You're not a hypocrite... Because a usage fee for TV would probably be minute based, not bandwidth based. And I'm pretty sure people would get upset if they included commercial time in the usage count.
Oppose that with Time Warner's plan... They charge you for bandwidth. So when you navigate to a page to get approximately 20 bytes of useful information, but the website has a bunch of flash animations that order on several megabytes, that's when I get pissed off. When all website go back to Plain Jane HTML and don't waste bandwidth, then maybe I won't be upset about paying per gigabyte. Until then, either charge me by the minute, or charge me a flat rate for unlimited.
Umm, have you ever seen what goes into asphalt? Limestone is frequently used as an aggregate. All the aggregate is sand and gray gravel... Asphalt cement is black, and will turn anything it touches black. Good luck finding some white asphalt.
Not just quick dry... All cement is an exothermic reaction. And would people SERIOUSLY stop calling concrete cement. Roads are made of concrete, which is a mixture of cement, aggregate, and water. Cement is only the binder of the mix.
Umm, Jet fuel is less refined than diesel or gasoline (using less refined to mean heavier oil, as the grandparent did)... Jet fuel is #1 fuel oil, and Diesel is #2. Jet fuel and diesel both have a higher energy density (more energy per unit volume) than gasoline. Thus there is more energy in a gallon of jet fuel or diesel than gasoline. That is in addition to the extra efficiency due to the higher compression ratios in diesel engines... But the jet fuel is a whole new ballgame because it's a turbine engine, not an internal combustion engine, thus being more efficient from the get go.
For a second there I thought you were talking about Casino Royale...
Too bad liberals want to ban guns...
You don't listen very well. Architects do NOT design buildings for strength. I don't know what the laws are in New York, but no structure built for public occupancy can be built unless the structural plans are stamped by a registered civil engineer in my state. Architects take a lot of art and drawing classes, but I have never seen one in a steel design course.
Secondly, no there is no plane load in ASCE 7 (the reference manual where load configurations are designed). I would really like to see a citation about the Empire State Building being designed for that. Any earthquake or wind load easily surpasses a plane impact in severity. Thus buildings will survive a plane impact. Also, the structural engineer probably doesn't design the fireproofing either. A separate (probably mechanical) engineer probably designed the fire suppression system and/or fireproofing on the building. And I do agree, he probably didn't take into account burning jet fuel in the design.
Engineers plan for the unexpected, but you can't plan for everything. We try to account for normal use and reasonable natural disasters, but if we try to design buildings to withstand all the horrors humanity can throw at it, nothing would ever get built.
2 complaints...
1st: Architects don't design buildings for strength... They design buildings for art and function. Civil engineers design a building for the loads applied to it.
2nd: In no way do civil engineers design for plane impact loads. I'm not saying a building wasn't designed to handle loads that a plane might put on a building, but the lateral loads that a civil engineer takes into account are wind and seismic loads. But like I said, a plane is more likely to inflict less load than a typical earthquake. However, sustained fire damage is what brought down the twin towers, not the direct force of the planes.
Seriously... Watchmen had an unnecessary amount of gore and FAR too much blue penis!
The problem in your logic is that people won't be looking for somewhere else to live. The people will be whining to the government to create a way for them to live beneath sea level at the expense of all the people who don't live near the ocean.
Wow, I have never seen an AC rant so quickly destroyed by such a short statement.
Too bad our campus used Novell's Iprint, which despite Novell being Linux friendly, doesn't work under linux, or actually just about any computer not running 32bit XP or Vista. They do this because printing costs 10c per page.
Gee, printing used to be free, and there used to be computer labs... Both are gone now, but tuition still goes up 8-10% a year. Where did the savings go?