Tag Archives: physics

Ghosts: is there a libertarian, religious or scientific explanation?


David Davis

I came across this a number of years ago while a student, doing a subsidiary on Nuclear physics: it is not an original idea and I have tried to restate  it as I remember.

This was presented as a semi-joky _Physics_  thesis paper at a dinner, and not a metaphysical one. It was presented by a real physicist. The main audience was comprised of Classicists, Lawyers and Historians, with us, the resident hard-Scientists, present and passing the Port round. Read more

I like this chappy’s cynicism


David Davis

It’s probably because he’s Czech, or perhaps it’s despite that instead.

I have spent, some years ago, quite a long cumulative time in his country, probably more than anywhere else except here. And I found the Czechs, particularly the South-Moravians (whose accent and dialect I learned to fool people in Prague with) to be charmingly romantic, but maybe it was just the all-pervading afterglow of joy at being released from the Stalinist Jackboot.

Libertarian Alliance Examination Board: a sample Science Paper


Fred Bloggs.

Here Is a newly issued paper from the LAEB (Libertarian Alliance Exams Board)

Appreciate or Die (Quote from Socialist art gallery).

Image4

Please only use a black ballpoint pen in this examination, as our exam marking                                                                                                                                                                                     monkeys are colour blind.

Time allowed : 3.278×10-29 sec

  • The maximum mark for this exam is 34.7
  • Show some of your working, but not all, if you do so marks will be deducted.
  • You will be awarded extra marks for answering these questions in a specific different language, but we’re not going to tell you which, if you answer in the wrong language you will automatically fail.

Any injuries sustained during this exam are the fault of the person taking the exam and not the LAEB (Libertarian Alliance Exams Board)

Sign Here: ________________________

Questions Start

1  Estimate the DC current, flowing in a one-turn copper coil which follows the earth’s equator, which would cancel the Earth’s magnetic field at either pole. (Horizontal component of field at lat 86o 30` N = 0.18 gauss, vertical component = 0.9 gauss. I gauss = 1E-5 Tesla.)

Answer:_______________________

______________________________

______________________________

______________________________

Maximum Mark: 2.3

2   Calculate the cross-sectional area of a square copper turn, polished and unblacked, and fully suspended, whose surface temperature will not exceed 800 K in dry air temperature of 320 K.

Answer:_________________________

_______________________________

_______________________________

_______________________________

Maximum Mark: 6.1

3   Calculate the gravitational field strength existing between the Milky Way and a hypothetical galaxy 13 billion LY away. Use 2E42 Kg for the mass of the Milky Way and 9E41 for the other galaxy.

Answer:_______________________

_____________________________

_____________________________

_____________________________

Maximum Mark: 7

4   Estimate the cross-sectional area of each of two Duct-tape fixtures, of 48mm width and 0.5mm thickness, applied always parallel to the direction of force, which would be required to separate reliably two opposite charges of 1C each at a distance of one meter in free Space. (Young’s Modulus of Duck Tape is assumed to be 4E9 Pa.)

Answer:______________________

_____________________________

______________________________

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Maximum Mark:2.4

5   Estimate the number of moles of human DNA on the Earth as of now, its total estimated mass, and the molar mass of human DNA. (Assume that one haploid human genome, complete, = 1 molecule. Also assume that the mean volume of all human cells is about 1.9 picoLitres.

Ignore human gametes in this answer, but also estimate the total number of these present on the planet at any moment. Use your knowledge of human population trends and age-band-statistics to derive as accurate an estimate for this number as possible, differentiating male form female gametes.

Answer:_______________________

_____________________________

_____________________________

_____________________________

Maximum Mark: 0.6

6   Calculate the reduction in heat capacity of the Gulf Stream over a calendar year, caused by a wind farm of 10,000 turbines directly in the path of the airstreams above it at latitude 55oN, each turbine having an installed generating output of 100Kw, at a height of 100M and operating at a 16% duty cycle. Use your own knowledge of geography, natural climate movements, astronomy, the heat capacities of water and moist air. The Sun’s radiated power output is about 3.92E26 Watts.

Estimate the extra mass, surface area and volume of North Polar ice that would build up in the Barents, Norwegian and Greenland Seas in one year, assuming that no other areas are affected, as a result of this set of turbines. (For quickness of solution, assume polar ice above latitude 65 radiates IR into space at 25 Watts/M2 at all temperatures above 240K.)

Answer:_______________________

______________________________

______________________________

______________________________

Maximum Mark: 1.6

7   You are to deliver a shell weighing about 1.5 imperial tons, at a range of 60 miles, from a barrel of diameter 460mm, at a target at the same elevation as the emplacement. (g = 9.81m/s2) Devise a suitable mathematical model from which the answers could be derived, and then calculate, in no particular order:

(a)  The barrel length

(b)  The time of flight

(c)   The maximum height reached by the projectile

(d)  The required muzzle velocity at 40o barrel elevation

(e)  The mean gas pressure (assume uniform)

(f)    The acceleration in the barrel

(g)  The muzzle velocity

Answer:___________________________

__________________________________

__________________________________

__________________________________

Maximum Mark: 4.7

8   Calculate the number of 25Kg sacks of rice that would be required, and the total volume of rice grains in cubic miles, if the Great King had been able to grant the wish of the Resident-Court-Mathematician who had invented Chess for him. The inventor asked for “one grain of rice on the first square, two on the second, four on the third, eight on the fourth, sixteen on the fifth…..”. Assume a grain of rice is a cylinder of length 6mm and diameter 1.25mm and that they pack approximately efficiently. State your packing density assumptions in your answer.

If the sacks used above are made of polythene, and must be 0.8mm thick, estimate the area of film to be manufactured, its mass, and the number of barrels of Saudi Heavy Crude that may have been used to make it. Use your knowledge of thermal cracking procedures and also of the average mass of a “barrel” and how much of this is realistically convertible into monomers for this question’s use. Density of polythene (MDPE type) is about 0.932 g/cm3.

Answer:____________________________________

___________________________________________

____________________________________________

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Maximum Mark:10

End Of Questions.

I have more GCSE science and maths papers issued under New Labour


UPDATE1:- Teachers want a day off “for admin“….yep, you’ve guessed it – it’s the GramscoMarxiaNUT.

And here’s a comparison paper from 1957:-

http://www.google.co.uk/search?hl=en&q=old+O+level+papers+university+of+london+1957&btnG=Search&meta=

(Sorry about the above – I could not separate the top item on that search from the rest of the googlepage.)

Try this here:-

o_level_1957

http://www.btinternet.com/~mathsanswers/html/o_level_papers.html

David Davis

We got a pingback this morning from Whoops, about the state-denial of dumbing-down, within State-directed education syllabuses. They quoted The Devil, and I have added Obotheclown, as secondary sources of comment about whta we said.

Here are some more papers you might like to try on an intelligent, home-educated 10-year-old from China, or indeed such a person from the UK who may be the same age or just a tiny bit older – there are some.

 

This is the “unit 3” paper (“higher”), taken by fairly bright 16-year-olds. Not that many get this far:

http://store.aqa.org.uk/qual/gcse/qp-ms/AQA-PHY3H-W-QP-JAN08.PDF

And this is the “mark scheme”:-

http://store.aqa.org.uk/qual/gcse/qp-ms/AQA-PHY3H-W-MS-JAN08.PDF

This is a “unit 2” paper (“higher”) – probably a larger proportion of candidates would take this one:

http://store.aqa.org.uk/qual/gcse/qp-ms/AQA-PHY2H-W-QP-JUN08.PDF

And this is its “mark scheme”:-

http://store.aqa.org.uk/qual/gcse/qp-ms/AQA-PHY2H-W-MS-JUN08.PDF

I fully expect that John Band will scrag me. But he cannot deny that these papers contain facile and shallow questions, glibly skating over real science, and which are about largely non scientific material, substantially answerable without having to understand anything more than the very basic equations of Newtonian mechanics….or worse.

We’ve been fisked! (I didn’t think we were important enough.)


David Davis

I’ve just had a good telling-off from someone called John Band (presumably  _the_  John Band!) for publishing this Physics GCSE paper, and suggesting that “the science” it contains is worth less than the paper it’s printed on, when compared with supposedly similar-grade papers of some years ago.

His post too got a lot of comments, not all of them unfavourable to us. I guess I’ll just have to leave it to the fogeyish commentators etc to sort out a verdict.

And John B himself won’t be replying, ‘coz he knows that I know that he knows that I’m just doing this to get more attention to the LA’s blog. But at least I don’t “follow” two billion people on “Twitter”, like Derek Draper. What a sad guy without real flesh-and-blood friends, but only interests. (I follow nobody, and I have sent no tweets.)

A British State-directed Physics paper for intelligent 16-year-olds


UPDATE2:- It’s no use merely moaning and whingeing as I am doing here. Even by bringing this more to people’s attention, we can change little in a hurry. The State has not only taken Nazi ownership of our children, but has also intellectually cast them adrift at the same time, and it’s all probably deliberate.

The remedy is to live with them in a houseful of books, use the said books liberally in front of them while making sure that these are text books about real stuff and not pretentiously awful Booker-novels, and discuss with them scientific discoveries and the history of same at mealtimes.

UPDATE1:- From Driver Rob, this is fine stuff and I agree totally. I also use “old” O-level (remember that?) text books to support A2-students of 18 in maths, and “old” GCSE science ones from the 80s and the pre-Blair-90s in general, to cover random GcSE/AS/A2 work from the ages of 15-19.

David Davis

I thought I’d already done this but must have left the page-from before publishing it.

http://store.aqa.org.uk/qual/gcse/qp-ms/AQA-PHY1AP-W-QP-MAR08.PDF

Here’s the mark scheme:-

http://store.aqa.org.uk/qual/gcse/qp-ms/AQA-PHY1AP-W-MS-MAR08.PDF

At last! the Catholic buggers in Rome (where they ought to be doing some thinking and homework) twig that they’re actually fighting pagans! By which I mean not Wiccans (who are generally harmless and useful and charming) but Gramsco-Marxians (who really really need and want to and like to kill people over disputes regarding fine interpretation of ideas)


David Davis

As a scientist, (strictly speaking I think I’d today be called a molecular biophysicist) I have never had any difficulty in reconciling the first Book of Genesis and I. John i with what greenazis and other prostitutors of words call “the science”.

But it’s heartening to see that the Vatican’s team, however ineptly (and I don’t expect miracles) is now coming out on side.

They’d better get their act together, and fast. Pagans take no notice even of people as sharp as Richard Dawkins, in their manio-hystericalist-efforts to drag Man back to paleolithic barbarism.

The problem with pagans of course, is that they’ve got into the Governments of places which matter.

The Pagans’ god is of course totalitarian. What else can he be? He laid it all down at the start, at Year Zero, and all have to follow him no matter what, on pain of death or on pain of losing your research grant. Men, dinosaurs, fossils, stars? You name it, he did it then and he did it first. He also demands sacrifices: these are often the things we love most, such as liberty, or pretty young girls (just to rub it in….no pun intended but it’s a good one.)

The Christians’ God laid down nothing as vulgate and inviolate: in the beginning was the Word: the Word was God, and the Word was With – by which the translators must mean “created by” – ablative –  God. For the Word, I substitute “order” or “Logos”. He merely created Himself. Everything else was His Thought, which must evolve later. So evolution must follow, since God exists in All Time and All Space like the rest of us. All we do is discover His Mind, slowly, at first, like now.

But in our trying to do this, Evil and Wickedness try to beset us, such as via the phantasms of “Jacqui” “Smith”, Hitler, Stalin, Gramsci, Marx, Pol Pot, “Al” Gore (who looks increasingly like Hermann Goering – go google) Ed Balls, Jo Brand, Jonathan Ross, Hugo Chavez, Saddam Hussein, Shootinputin187, that woman on the telly whose name I can’t recall, and others.

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