John Cuthber

Using a fuse is a good idea. But this "because as the temp increases resistance increase which draws more current" is still wrong. As the motor gets hotter it will draw (slightly) less current. But, as the load on the motor increases and the speed decreases, the current will rise. You might need to protect the motor from the high currents that flow when the motor is stalled. However that runs you into a different problem- the motor is always "stalled" when you first start it. So, a fuse that would protect the motor from a long term over current, would blow every time you started the motor. It's complicated when you do this with big motors. With small motors and batteries it's not an issue- the internal resistance of the battery and the motor will limit the current as long as you don't use too high a voltage.

Even without any resistance, the circuit would have inductance and that would limit the rate at which the charge on the capacitor could change.

"Resistors in series simply add resistance to a circuit. The more resistance you have the more current required." Nope. Arguable, the more resistors you have, the more voltage you would require. "So if your concern is about providing to much power to the motor a resistor in series won't improve your situation. Yes it would. The difficulty is calculating the value of the resistor you need- especially since this depends on the current drawn my the motor and that, in turn, depends on the load. "That will prevent the motor from overheating because as the temp increases resistance increase which draws more current (amps" Nope, when it gets hot the resistance rises (slightly) and it draws slightly less current. But the resistance of a fuse is small and so it doesn't affect the current much until it gets hot enough to melt (the hint is in the name). Once it melts there's no longer a wire to carry the current. Why post nonsense? On a related note, Sensei, when you say "Without anything Ampere meter is showing 2.4 A." do you mean that you connected the meter directly to the battery without anything to limit the current? If so, you risked damaging the meter. You should never try to measure the current from a voltage source.

My best guess is that, for example, Christians designed their buildings differently in order to show that they (the Christians) were different. An architectural shibboleth as it were.

Write to the authors and ask for a copy. I always gave out free copies of papers I had published and I know many other authors do to. (or, to put it another way, you may already have access to the stuff you paid for- you just don't realise it so you are trying to change the system without understanding it. That sounds rather like climate change)

"Among all cloud-aerosol interactions, the invigoration effect is the most elusive" Because it is small, and largely overturned by the other effects. "a substantial part of this anthropogenic forcing over the oceans occurred at the beginning of the industrial era" So, it's not contributing to recent changes.

Nope, that's a relative humidity, not an absolute humidity. So, you are wrong about this too "So an increase of 1 degree would not mean an increase in humidity directly. In fact the opposite initially." "I only do basic science," No, you get basic science wrong. "but it's good to have somebody that does do those points don't you think?" No, not really, it means that someone has to waste time correcting you. If you didn't bother to post rubbish in the first place, it would be better all round.

"Jader Monari of the Institute of Radio Astronomy in Medicina, Italy, has studied the Hessdalen site since 1996 and found that rocks in the valley are rich in zinc and iron on one side of the river running through it, and rich in copper on the other side. ‘If there is sulphur in the water in the middle, it makes a perfect battery’ he said" Balderdash. Unless the copper and zinc are present as the metals rather than their ores. Natural metallic copper is possible (though it's rare). Free zinc is essentially impossible.

You can do colourimetric tests with relatively cheap equipment.

"the beer has run out. And I can't post without its stimulus. Sad, but true!" What an unfortunate trait. I trust that you have done th decent thing and ensured that you don't have children to pass it on to.

Quite a lot of ideas were considered positively, until we knew better. Eugenics is one of them. Using the fact that it was once popular as a justification for doing it now is a logical fallacy. People generally want to breed. Stopping them doing so is de facto sterilisation- the method is unimportant. So, perhaps you can explain this bit "It need not involve "forced sterilisation"." As far as I can tell, it does. "But you obviously want it to," Nope, it does no matter what I want. "so you can make it sound unacceptable." It is unacceptable so "making it sound unacceptable" is just a matter of describing it.

"by tendency I mean a gene may tend to make some act in a certain way." Or they may not. Which leaves room for free will (however real that may be). You have essentially the genes you were born with. If you ever make different decisions in similar circumstances that decision can't be a result of your genes.

Sorry, but that won't work. Heavy ice is soluble in ordinary water. This bit "a frozen sample of D2O will sink in normal water, and remain frozen so long as the water temperature is kept below ~38.9 degrees F." is wrong. It's a bit like saying if I cool a mixture of salt and water below the melting point of salt (about 800 degrees C) the sale will freeze out. Well, look at the oceans- that's not what happens. In fact it's even worse. When you cool salty water at least some of the salt might come out of solution as fairly clean salt. If you cool a mixture of normal water and heavy water you get a mixed ice. The ice is slightly richer in D2O than the original water, but it's nothing like pure.

What do you consider the word "tendency" to mean?

If you mix roughly equal volumes of ice cold milk and cola you get a sort of fizzy milk shake. Quite a nice drink. If the milk isn't perfectly fresh or the drinks are not cold, you get a revolting clotted mess.

What do you mean by "inverses of Q2 and Q1"?

I think the simple answer to the OP's question "What is the most hazardous factor injuring a motorbike driver?" is that you are not strapped into a padded steel box

The link does not seem to work. What is it a picture of?

1 Not applicable. You have made an assumption which is invalid. 2 Same as 1 3 Exactly the same way that you plan to transmit it from space- but I have an easier job because I can fix problems and probably won't need to transfer the power as far. 4 same as 1 5 same as 1 6 So, it's just as inefficient when you use it in space as when I use it on Earth. 7 If we are talking about building infrastructure of this sort the costs will be huge. Paying off the nomads wouldn't be a problem. But the real answer is that we won't be depriving them of very much- see point 1. 8 exactly the same people as would look after it in space (well- actually you can use cheaper people). 9 There is no Q 9 10 build them so they do meet the local regulations and laws 11 Why bother? Again, you have made a big assumption and it is the reason for most of the problems you have raised. Perhaps you should try to work out what your mistake is. Good luck.

Do you not realise that, if you have ice, and want water, and you have sunshine...?

The population of Cuba is a little bigger than that of London. Ignoring the question of whether it's fair to poach their doctors, do you really think that have very many? So, where are you going to find this flood? Anyway, if we are already short of people in medicine to the extent that the medical schools are taking other depts' rejects, how many more can we find without compromising (further) on quality?

If I had got 50% in my exams I would have been lucky to get anything better than a fail. Still there's good news, we agree on this bit "that's why there's an interview". It's because, one way or another, the exams don't tell you everything. But I'm still puzzled. If, as you say ,"et's say someone is studying physics and gets a 2.2 (50%) in their degree and they want a graduate qualification within the next 4 years. They would not get in to graduate physics with a 2.2 but they could settle for medicine." How come the market isn't already flooded? Why haven't we got a stack of doctors who didn't make the grade to do post grad physics (or lots of other subjects)? Here's another possibility. You actually need to be "clever" to be a doctor (OK that's debatable- but let's run with it). Also, there's not that many "clever" people about. Some of them, at 18 decided to do physics or English or whatever. Three years on they get their degrees- with a spread of grades because, for example,they found the bar more interesting than the library, Some people had decided at 18 to do "medicine" and have degrees in things like Human Anatomy, but there are not enough of them to fill the jobs for doctors. Is it surprising that the medical schools look at the people who have degrees (who cares what the subject is) and who want to be doctors (who cares what the motivation is). They strip out the real dross- thirds and fails and interview the rest to see if they are likely to make it as doctors- are they "clever". Some will be. Now you can look at "clever" as meaning any set of skills or traits you want. It could be logic- though I accept that's not a big part of medicine. It could be learning a hell of a lot of facts or it could be something else. The process you deride is one by which those people with the skills to go into medicine (as judged at interview) get the chance to do so, even if it wasn't their choice at 18. Where are you going to find the other people with those skills to "flood the market"? Medicine is already rather well paid- so you can't offer these people more money. If, as you suggest, it's not that difficult then there's already disproportionate money on the table and you don't think it's getting enough takers. It's a prestigious job so that's going to attract people. How are you going to recruit the "flood"?

Well, I had a look at the first link. It does not mention 50% anywhere. It does talk about a score of 50 in some Australian based test but that's not what we were on about. And what it says is "We have received and analysed the results for GAMSAT 2014 entry and can confirm that the overall minimum cut-off score to be selected for interview is 60," So it gives the criteria you need to meet before they will interview you. That's a whole different kettle of fish from what they want before they let you in. The others also don't seem to mention a percentage. So, your evidence doesn't seem to support your claim.

According to this http://en.wikipedia.org/wiki/Atmosphere_of_Venus most of the atmosphere on venus is carbon dioxide. Cooling it to roughly the temperature of the Earth wouldn't stop it being a gas. So essentially all that gas would still be there. On average it would move closer to the surface so it would be attracted more by gravity (but not much). On the whole, I don't think it would make much difference to the pressure. It certainly wouldn't be anything like the pressure here on Earth.

Whatever your teacher may have said, ajb is right. We don't have any shortage of hydrogen. Two thirds of the world's surface is covered in stuff that's got plenty of hydrogen in it.