Many is vague: let's put a real number on it and say 6 orders of magnitude, or 25 MW. Pretty good size I'd venture. Multiply that by ~40uN/25W and you've got all of 40 Newtons of force. How often do you really suppose a 25MW microwave resonator is operated in a situation where 9lbs of force would be noticeable? Unless I'm drastically overestimating the size of such a thing friction alone would likely hold it in place. And if not a single 1/8" bolt certainly would.
True, i should have run some numbers. In fact 25MW is not far off what accelerators use.
Photon momentum is easy to calculate. E=mc^2 so the mass per second per watt is m=P/c^2, and its moving at the speed of light so multiply by c and you get momentum per second, or force F=P/c . That is for 1N of force you need 3x10^8 watts. Or for one watt 1/3e8=3.333x10^(-9).
Finally, if we take the NASA measurements as indicative of forces being generated...
Lets be very clear, their data shows no such force. Just systematic error. If you get the same "significant" force from the negative control, then its systematic error and you don't make stupid claims.
We understand EM forces and fields very very well. Quite frankly the original claims don't even past a basic "hinky meter" test. They certainly don't have any proper math/physics to back anything up.
Read the results again. They shown no effect outside systematic error. In God we trust, the rest of you show me the data. And the abstract is *not* the data.
That was with 25 watts. There are cavities with truly massive powers in them. Many orders of magnitude larger than here. For example superconducting cavities used for linear accelerators. The forces they claim would be large enough to be noticed. Also if the force is less than 3.3 nN per watt, its no better than a pure photon drive. Ie just point your microwave transmitter backwards.
There is nothing magic about the fact there is nothing in between you and the planet. All forces act over a distance. When i want to push a ship, i must push against something else. Sure that something else does not need to be on the ship to conserve momentum. I could perhaps invent anti gravity and push against a planet that is near. We don't know how to do that, but such a thing would conserve all the laws we generally assume will never be broken.
So short answer, Yes. However no such force has been found or postulated in any realistic fashion.
If you want to test every claim by people that don't appear to be charlatans, you will spend entire lifetimes just showing bunk is bunk (try anitgravity, free energy BS on youtube). Extraordinary claims need extraordinary evidence.
There is another problem with the emDrive. Given the shape of microwave cavities used in communications and powers involved, we would have seen the effect long before now.
Are you falling toward earth or is earth falling up to you? In reality its both. That is why momentum is conserved. In fact conservation of momentum follows from the fact that you can only have forces * between* things and that they are opposite, ie pull together, push etc. Things here can also mean photons.
No its not. U238 is as much a fuel as Th is (they are both fertile, not fuels). At is about 5x less prevalent on land. Not orders of magnitude. You clearly have no idea what you are talking about.
Th is 5x more prevalent. That is *not* orders of magnitude. Oh and that is only if you ignore ocean reserves of Uranium.
China has planned just one LFTR and IIRC it is not even started construction. Th in used is some of the standard reactor designs. ie *not* Liquid anything.
And all the breakers and other fail safes kick in (I have seem thermal trips on some). The transformer is saved. Even with the last event only *one* large transformer failed and that was because the breakers failed. Oh and it was fixed/replaced routed around in just 9 hours. There was no "wait for a new one on order for weeks".
That is just plain stupid. If i have listened to someone in the past, and they have always given poor, uninformed, retarded bullshit ideas. Then i would be an idiot to keep wasting my time listening to further ideas from these idiots.
You mite what to check a few more sources. These days is quite easy to be a healthy vegetarianism. Mostly because you can have all year access to foods that 100 years ago you could not. Vegan diets are harder to get right. But again in modern society it can be done with a bit of care.
You should do what someone says, or not, depending on whether their argument makes sense.
Greenpeace doesn't make any sense half the time they open their mouth, the rest is just anti corporate feel good Luddite bullshit. And i will take someones actions into account before i even bother to listen to them.
This is not always true. My eyesight got worse at about 30 and I like to use -.75 and -1.0 contacts sometimes (gets me back to 20/20). My last eye check 10 years later and -.75 and -1.0 still gets me back to 20/20.
Water is mostly wasted. Changing to drip irrigation can save a lot of water in dry climates where a lot of it evaporates. Waste water from cities is much easyer and cheaper to treat into potable water than desalination for example.
We are mostly very wasteful with water because its so cheap.
But now most airlines charge for any checked baggage,...
Only american ones. I fly a bit with work and to visit family. My last trip from EU to Mexico was with United. They advertise "free check-in bag with frequent fly crap" as a feature while every other airline i fly with its just free. Then the personal entertainment system is like $7, and its crammed with advertising. Seriously worst airline for international travel. They even charged for the meals.
Use a real airline. It just cheaper since you don't get charged extra to use the plane you paid for.
Yea but there is like 3 tickets available per train. Trains and flights are fairly comparable. But trains don't get that expensive for last minute travel. I use the trains a lot in fact.
No.. We do these transactions with people I don't know all the time. And its fine. Last time i got a cell phone for my daughter, I am in Switzerland she is NZ the seller was some guy in a different city in NZ. We didn't need to see each other and use cash. We had no reason to trust each other.
And if you don't trust someone, meeting them in person makes them no more trustworthy. How many mile on the clock on that car? Was it really looked after etc. Sooner or later you just have to trust. And mostly that works out. Cash does not fix or change that.
In NZ this problem was fixed by providing a "NZ peoples bank". Really just a government bank. Since welfare and everything is only via direct debit, even the bankrupt need to be able to have accounts.
Slashdot Mirror
Many is vague: let's put a real number on it and say 6 orders of magnitude, or 25 MW. Pretty good size I'd venture. Multiply that by ~40uN/25W and you've got all of 40 Newtons of force. How often do you really suppose a 25MW microwave resonator is operated in a situation where 9lbs of force would be noticeable? Unless I'm drastically overestimating the size of such a thing friction alone would likely hold it in place. And if not a single 1/8" bolt certainly would.
True, i should have run some numbers. In fact 25MW is not far off what accelerators use.
Photon momentum is easy to calculate. E=mc^2 so the mass per second per watt is m=P/c^2, and its moving at the speed of light so multiply by c and you get momentum per second, or force F=P/c . That is for 1N of force you need 3x10^8 watts. Or for one watt 1/3e8=3.333x10^(-9).
Finally, if we take the NASA measurements as indicative of forces being generated...
Lets be very clear, their data shows no such force. Just systematic error. If you get the same "significant" force from the negative control, then its systematic error and you don't make stupid claims.
We understand EM forces and fields very very well. Quite frankly the original claims don't even past a basic "hinky meter" test. They certainly don't have any proper math/physics to back anything up.
Read the results again. They shown no effect outside systematic error. In God we trust, the rest of you show me the data. And the abstract is *not* the data.
That was with 25 watts. There are cavities with truly massive powers in them. Many orders of magnitude larger than here. For example superconducting cavities used for linear accelerators. The forces they claim would be large enough to be noticed. Also if the force is less than 3.3 nN per watt, its no better than a pure photon drive. Ie just point your microwave transmitter backwards.
Yes. But this drive claims to use EM force. We understand that the best.
There is nothing magic about the fact there is nothing in between you and the planet. All forces act over a distance. When i want to push a ship, i must push against something else. Sure that something else does not need to be on the ship to conserve momentum. I could perhaps invent anti gravity and push against a planet that is near. We don't know how to do that, but such a thing would conserve all the laws we generally assume will never be broken.
So short answer, Yes. However no such force has been found or postulated in any realistic fashion.
If you want to test every claim by people that don't appear to be charlatans, you will spend entire lifetimes just showing bunk is bunk (try anitgravity, free energy BS on youtube). Extraordinary claims need extraordinary evidence.
There is another problem with the emDrive. Given the shape of microwave cavities used in communications and powers involved, we would have seen the effect long before now.
Are you falling toward earth or is earth falling up to you? In reality its both. That is why momentum is conserved. In fact conservation of momentum follows from the fact that you can only have forces * between* things and that they are opposite, ie pull together, push etc. Things here can also mean photons.
Of course you use a scope/samplers with RF (at uni, we use scopes a lot). And yea quite a few hobbyist mess around with that stuff too. For fun.
So when will this magical free market fix things and have someone sell a fully featured out of the box scope at the base model price?
No its not. U238 is as much a fuel as Th is (they are both fertile, not fuels). At is about 5x less prevalent on land. Not orders of magnitude. You clearly have no idea what you are talking about.
Th is 5x more prevalent. That is *not* orders of magnitude. Oh and that is only if you ignore ocean reserves of Uranium.
China has planned just one LFTR and IIRC it is not even started construction. Th in used is some of the standard reactor designs. ie *not* Liquid anything.
Science does not work that way. Ever. And even then you don't even have one source.
The current skyrockets...
And all the breakers and other fail safes kick in (I have seem thermal trips on some). The transformer is saved. Even with the last event only *one* large transformer failed and that was because the breakers failed. Oh and it was fixed/replaced routed around in just 9 hours. There was no "wait for a new one on order for weeks".
That is just plain stupid. If i have listened to someone in the past, and they have always given poor, uninformed, retarded bullshit ideas. Then i would be an idiot to keep wasting my time listening to further ideas from these idiots.
You mite what to check a few more sources. These days is quite easy to be a healthy vegetarianism. Mostly because you can have all year access to foods that 100 years ago you could not. Vegan diets are harder to get right. But again in modern society it can be done with a bit of care.
Its funny cus is true marge.
You should do what someone says, or not, depending on whether their argument makes sense.
Greenpeace doesn't make any sense half the time they open their mouth, the rest is just anti corporate feel good Luddite bullshit. And i will take someones actions into account before i even bother to listen to them.
This is not always true. My eyesight got worse at about 30 and I like to use -.75 and -1.0 contacts sometimes (gets me back to 20/20). My last eye check 10 years later and -.75 and -1.0 still gets me back to 20/20.
Water is mostly wasted. Changing to drip irrigation can save a lot of water in dry climates where a lot of it evaporates. Waste water from cities is much easyer and cheaper to treat into potable water than desalination for example.
We are mostly very wasteful with water because its so cheap.
But now most airlines charge for any checked baggage,...
Only american ones. I fly a bit with work and to visit family. My last trip from EU to Mexico was with United. They advertise "free check-in bag with frequent fly crap" as a feature while every other airline i fly with its just free. Then the personal entertainment system is like $7, and its crammed with advertising. Seriously worst airline for international travel. They even charged for the meals.
Use a real airline. It just cheaper since you don't get charged extra to use the plane you paid for.
Yea but there is like 3 tickets available per train. Trains and flights are fairly comparable. But trains don't get that expensive for last minute travel. I use the trains a lot in fact.
No.. We do these transactions with people I don't know all the time. And its fine. Last time i got a cell phone for my daughter, I am in Switzerland she is NZ the seller was some guy in a different city in NZ. We didn't need to see each other and use cash. We had no reason to trust each other.
And if you don't trust someone, meeting them in person makes them no more trustworthy. How many mile on the clock on that car? Was it really looked after etc. Sooner or later you just have to trust. And mostly that works out. Cash does not fix or change that.
Not the current ones. 20mins for a transaction to "accept"?
In NZ this problem was fixed by providing a "NZ peoples bank". Really just a government bank. Since welfare and everything is only via direct debit, even the bankrupt need to be able to have accounts.