said of a raid on Hamburg that destroyed most of Germany's ball bearing factories
And here I thought Germany's ball bearing industry was concentrated in Schweinfurt (which was bombed quite heavily for precisely this reason).
Ball bearings are a special case. The factories take a long time but are very easy to destroy because they apparently used flammable oil baths.
As far as I've read, the raids on the ball bearing factories were considered very successful by the Allies, because they've hit the factories and saw that the buildings had collapsed. However, making ball bearings requires heavy machinery which will survive the building collapse, so all the Germans had to do was remove the rubble and resume production.
Then again, maybe it's a question of what type of bomb to use. An incendiary might work better on a ball bearing plant than a HE.
And armoured vehicles need regular spare parts that need ball bearings.
Unless you switch to roller bearings, which are more easily made and only slightly degrade the performance of the vehicle. This is what the Germans did later on.
If you add in the delta V from whatever event caused it to leave the surface of said body, then its velocity = V(initial) + dV will result in an orbit farther from the sun.
delta V can also be negative.
Also, even with a positive delta V, chunks might end up in elongated orbits that give them a chance to hit the inward planets even though their maximum distance from the sun is larger than their starting point.
But, as some others have pointed out, the main reason why we won't have a lot of Earth meteorites on Mars (or Venusian meteorites on Earth) is that Earth and Venus have a higher gravity than Mars.
You have to do some clever orbital mechanics to send probes to Venus and Mercury.
No doubt about that, but the main reason for this is that we want probes to get there within a short (in astronomical terms) time frame and not just have an X % chance of a collision once every couple of hundred years (which would be perfectly acceptable for meteorites). We also want our probes to be able to insert into an orbit and not just smack into their target.
I don't know about Venusian meteorites, but the vast majority of stuff that heads inward [...]
Which gives it a good opportunity to hit any planet that's farther inward.
slingshots around the sun and back out, so I don't buy your theory.
It doesn't matter in which direction it goes first. To hit something that's farther outward, it needs to be launched with enough velocity to a) escape the first planets gravity well (good point made by some other posters here) and b) move away from the sun far enough to actually cross the orbit of one of the outward planets.
Even if something "slighshots" around the sun, it won't go farther out than its point of origin plus some distance it gets from its initial velocity. It's not a real "slingshot" maneuver, just an orbit. In order to pick up velocity (with a real slinghshot maneuver, like the ones performed by space probes), it would have to approach a planet at juuuuuust the right angle... a fairly rare event.
It's very likely there is life on Mars, but not necessarily native Martian life. Given that we've found lots of Martian meteorites on Earth, a lot of Earth rocks must have made it to Mars - and living organisms pervade the upper crust of our planet.
Given that Mars was hospitable to life earlier than Earth was, life on Earth might even have started on Mars.
Also, it's probably easier for meteorites to travel inward than outward in the solar system (due to the sun's gravity well). We've found lots of Martian meteorites on Earth, by how many Venusian meteorites ?
It is buggy, slow, fragile, and a nightmare to maintain.
When looking back at my first project, I feel the same. But I also think that I've learned a lot from it, and all subsequent projects were much, much better.
So, by being "not proud" of your code, you've made the first step towards improving it.
When nuclear waste has really been used up, there's practically no danger anymore, because there shouldn't be any energy in it that could irradiate for hundreds of years, because that energy has been used.
Ow.
Please refer to a nuclear physics textbook of your choice (especially the parts about nuclear fission and decay chains) to find out why reality is different from your statement.
(Short summary: At some point, you'll end up with isotopes that you cannot extract energy from by fission anymore, but are still radioactive for quite a while.)
But likewise anything that is radioactive is potential fuel!
Err... uranium and plutonium aren't nuclear fuels because they're radioactive. They (or rather: certain isotopes) are nuclear fuels because they're fissile, meaning that if you pop a neutron into them, they're going to split, and release energy and more than one neutron.
Something that is simply radioactive is a very, very poor nuclear fuel. You cannot control the rate at which it releases energy (that's set by the decay constant) and you get very little actual energy by radioactive decay compared to fission.
Yes, dying of various sorts of nasty sh!t has been a perfectly natural thing for the most time that humans existed, up until about 150 years ago. Want some smallpox ? No ? How about bubonic plague ? Cholera ? Tuberculosis ? Typhoid ? Any of those sound appealing ? Or would you rather try tetanus, polio or the measles ?
If the vaccines dont work, maybe you should look at ways to improve general health and habits, rather than giving a "cure" before the disease.
Vaccinations are not a cure. Just like fireproofing your home isn't a cure when it's already on fire.
and often a way for the body to purify itself (ie with fever) and build normal resistance.
Yes, let your body "purify" itself from polio and write about the results. If you survive and are still able to push a key on your keyboard.
No, it's because kids aren't allowed to play outside, eat dirt, and do so many other things that their predecssors did.
It's probably very easy for a lot of trepidation about vaccines because of past experience, anecdotal it may very-well be, however it does not help when polititians, school boards, professional organizations (AMA) AND big drugcos all gang up and require new vaccines mandatory as soon as the trial period is complete.
Vaccines aren't a big business. They cost a lot to develop (and some have to be developed every year), and the price of one dose is tiny compared to other types of drugs. Yes, there's a lot of profit involved in making drugs, but vaccines are the wrong place to look for evil conspiracy theories.
Vaccines are why we aren't hearing about droves of people crippled by polio or dying from measles, smallpox and tetanus anymore. At least not in "civilized" countries.
To be fair, whenever you mix treatments there's some risk of an interaction between them.
If your immune system can't handle three or more different types of bugs at the same time, then you need to see a doctor immediately, because you're immune deficient.
Probably a very small risk.
Much, much smaller than the risk from getting poked with a needle several times and having several times the preservative (which might just be formaldehyde) injected into your body.
It's a shame that the children had to pay for the parents stupidity
It's more of a shame that the one kid had to pay the price for the stupidity of the other kids' parents. Too bad there's too little legal leverage to sue them into oblivion.
Non-vaccinated people are a danger to no one but themselves.
Ugh, so it's not just youtube - now unscientific BS is being spread on slashdot, too.
Well, big news: Vaccinations don't make you completely immune, but reduce your chance to catch a certain disease by quite a lot. You can still catch it if you're exposed to enough of the microbe/virus that causes it. And who's more likely to mass-produce the bug - a vaccinated or an unvaccinated person ?
That's quite simplified, but at least that way even someone who doesn't have a medical/biology background might get it.
And I don't believe that combining 3 or more immunizations into a single shot is always such a great idea.
Why ? Why shouldn't it be "such a great idea" ?
The most harmful parts about immunizations are a) getting poked with a needle and b) the preservatives in the vaccine. The more immunizations you pack in a single shot, the less shots you need, and the less poking takes place and the less preservatives get injected into your system.
And your immune system has absolutely zero problems with attacking three or even six different kinds of bugs at once. Heck. It probably kills several dozen different types of microorganisms each day, even without any immunizations.
So why shouldn't it be a good idea to combine several vaccines into one shot ? Other than rumors and "I heard it from someone else" ?
95% of people do not have a windows live CD handy and the knowledge of how to restore an overwritten boot.ini file.
Ugh. You can use a plain vanilla XP install CD or one of those "recovery" CDs, too. If you don't have any of those, then go to the nearest store and buy a legal copy of Windows XP.
I'm sure it's hard to hack a sheet of paper and a cardboard box. Please, leave democracy "unhackable", because where there's no paper for voting, there's no hard proof that you really did it...
... and scratch our votes into shards of pottery. How's that for hard proof ?
It's not like there aren't problems with Intel's CPUs - just take a look at the problems with the MMU in the Core 2 - but no-one is suggesting Intel is doomed.
That's because Intel's piggy bank is much, much fuller than AMDs. Not to mention the huge marketing weight of their brand names.
Slashdot Mirror
And here I thought Germany's ball bearing industry was concentrated in Schweinfurt (which was bombed quite heavily for precisely this reason).
Ball bearings are a special case. The factories take a long time but are very easy to destroy because they apparently used flammable oil baths.
As far as I've read, the raids on the ball bearing factories were considered very successful by the Allies, because they've hit the factories and saw that the buildings had collapsed. However, making ball bearings requires heavy machinery which will survive the building collapse, so all the Germans had to do was remove the rubble and resume production.
Then again, maybe it's a question of what type of bomb to use. An incendiary might work better on a ball bearing plant than a HE.
And armoured vehicles need regular spare parts that need ball bearings.
Unless you switch to roller bearings, which are more easily made and only slightly degrade the performance of the vehicle. This is what the Germans did later on.
What problem ?
Bremsstrahlung occurrs when electrons are decelerated. Does this laser use some kind of electron accelerator ?
Lasers of that power aren't harmless. Even the reflected light can still fry your retina.
delta V can also be negative.
Also, even with a positive delta V, chunks might end up in elongated orbits that give them a chance to hit the inward planets even though their maximum distance from the sun is larger than their starting point.
But, as some others have pointed out, the main reason why we won't have a lot of Earth meteorites on Mars (or Venusian meteorites on Earth) is that Earth and Venus have a higher gravity than Mars.
You have to do some clever orbital mechanics to send probes to Venus and Mercury.
No doubt about that, but the main reason for this is that we want probes to get there within a short (in astronomical terms) time frame and not just have an X % chance of a collision once every couple of hundred years (which would be perfectly acceptable for meteorites). We also want our probes to be able to insert into an orbit and not just smack into their target.
Which gives it a good opportunity to hit any planet that's farther inward.
slingshots around the sun and back out, so I don't buy your theory.
It doesn't matter in which direction it goes first. To hit something that's farther outward, it needs to be launched with enough velocity to a) escape the first planets gravity well (good point made by some other posters here) and b) move away from the sun far enough to actually cross the orbit of one of the outward planets.
Even if something "slighshots" around the sun, it won't go farther out than its point of origin plus some distance it gets from its initial velocity. It's not a real "slingshot" maneuver, just an orbit. In order to pick up velocity (with a real slinghshot maneuver, like the ones performed by space probes), it would have to approach a planet at juuuuuust the right angle ... a fairly rare event.
Given that Mars was hospitable to life earlier than Earth was, life on Earth might even have started on Mars.
Also, it's probably easier for meteorites to travel inward than outward in the solar system (due to the sun's gravity well). We've found lots of Martian meteorites on Earth, by how many Venusian meteorites ?
Actually, from good writers you'll get novels that have been re-written several times before they are published.
When looking back at my first project, I feel the same. But I also think that I've learned a lot from it, and all subsequent projects were much, much better.
So, by being "not proud" of your code, you've made the first step towards improving it.
Ow.
Please refer to a nuclear physics textbook of your choice (especially the parts about nuclear fission and decay chains) to find out why reality is different from your statement.
(Short summary: At some point, you'll end up with isotopes that you cannot extract energy from by fission anymore, but are still radioactive for quite a while.)
Not wasting energy is un-American ! The American way to tackle any problem is to throw more energy at it, to hell with efficiency.
Only liberal terrorist commie hippies would suggest conserving energy.
Say that again after you've dragged your kicking and screaming toddler to the pediatrician for the umpteenth time for even more shots.
And, formaldehyde??
What, you didn't know that ?
Err
Something that is simply radioactive is a very, very poor nuclear fuel. You cannot control the rate at which it releases energy (that's set by the decay constant) and you get very little actual energy by radioactive decay compared to fission.
No, they're evolved from them.
So "Getting stuck with a needle only once.", and "Getting injected with formaldehyde only once." aren't reasons ?
Yes, dying of various sorts of nasty sh!t has been a perfectly natural thing for the most time that humans existed, up until about 150 years ago. Want some smallpox ? No ? How about bubonic plague ? Cholera ? Tuberculosis ? Typhoid ? Any of those sound appealing ? Or would you rather try tetanus, polio or the measles ?
If the vaccines dont work, maybe you should look at ways to improve general health and habits, rather than giving a "cure" before the disease.
Vaccinations are not a cure. Just like fireproofing your home isn't a cure when it's already on fire.
and often a way for the body to purify itself (ie with fever) and build normal resistance.
Yes, let your body "purify" itself from polio and write about the results. If you survive and are still able to push a key on your keyboard.
No, it's because kids aren't allowed to play outside, eat dirt, and do so many other things that their predecssors did.
It's probably very easy for a lot of trepidation about vaccines because of past experience, anecdotal it may very-well be, however it does not help when polititians, school boards, professional organizations (AMA) AND big drugcos all gang up and require new vaccines mandatory as soon as the trial period is complete.
Vaccines aren't a big business. They cost a lot to develop (and some have to be developed every year), and the price of one dose is tiny compared to other types of drugs. Yes, there's a lot of profit involved in making drugs, but vaccines are the wrong place to look for evil conspiracy theories.
Vaccines are why we aren't hearing about droves of people crippled by polio or dying from measles, smallpox and tetanus anymore. At least not in "civilized" countries.
If your immune system can't handle three or more different types of bugs at the same time, then you need to see a doctor immediately, because you're immune deficient.
Probably a very small risk.
Much, much smaller than the risk from getting poked with a needle several times and having several times the preservative (which might just be formaldehyde) injected into your body.
It's more of a shame that the one kid had to pay the price for the stupidity of the other kids' parents. Too bad there's too little legal leverage to sue them into oblivion.
Ugh, so it's not just youtube - now unscientific BS is being spread on slashdot, too.
Well, big news: Vaccinations don't make you completely immune, but reduce your chance to catch a certain disease by quite a lot. You can still catch it if you're exposed to enough of the microbe/virus that causes it. And who's more likely to mass-produce the bug - a vaccinated or an unvaccinated person ?
That's quite simplified, but at least that way even someone who doesn't have a medical/biology background might get it.
"People" much, much more readily believe unscientific BS, myths and outright fabrications than facts and studies.
Why ? Why shouldn't it be "such a great idea" ?
The most harmful parts about immunizations are a) getting poked with a needle and b) the preservatives in the vaccine. The more immunizations you pack in a single shot, the less shots you need, and the less poking takes place and the less preservatives get injected into your system.
And your immune system has absolutely zero problems with attacking three or even six different kinds of bugs at once. Heck. It probably kills several dozen different types of microorganisms each day, even without any immunizations.
So why shouldn't it be a good idea to combine several vaccines into one shot ? Other than rumors and "I heard it from someone else" ?
Ugh. You can use a plain vanilla XP install CD or one of those "recovery" CDs, too. If you don't have any of those, then go to the nearest store and buy a legal copy of Windows XP.
No, terrorists could use rocks as weapons.
Alternatively, just use a whole brick.
That's because Intel's piggy bank is much, much fuller than AMDs. Not to mention the huge marketing weight of their brand names.