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John

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Physics, Mathematics, Electronics, Computing and building and Cars and Cooking = My interests Christian

  • fly up nose?

    if a fly gets stuck up the nose, will the mucus dissolve the fly?

    7 AnswersRespiratory Diseases5 years ago
  • fly up nose?

    Im not sure if a fly went up my nose, my left nostril feels slightly more blocked than my right one and I keep coughing up green "blocks" of mucus. will the fly just dissolve in the nose?

    3 AnswersRespiratory Diseases5 years ago
  • Name of song please?

    fairly old song I believe, it has a harmonica/ accordion playing through the song which is all you hear at the beginning. it would have been in the charts (UK /US) and goes something like this at the beginning with the harmonica/accordion:

    Dunn, dunn , Dunnnnnnn-dun-dun ,dunnnn, dunnn, dunnn ,dunnn, dunn , dun-dun, dun-dun repeat

    3 AnswersOther - Music5 years ago
  • Vinyl records and phonographs?

    if the variable in a record is the depth, how can you get both loudness (amplitude) and frequency out of 1 variable. perhaps a 1mm groove codes for a 1kHz sound, but what about its amplitude.

    Further another question I have is :

    suppose you have recorded a whole orchestra on a vinyl record, the output is some random squiggly waveform, with each component have different amplitudes resulting in a unique waveform, how come we can pick out from this mess which parts are the violin, the piano, the cello etc...

    Also, it makes me wonder why they struggle when trying to remove a vuvuzela from football match recordings is so difficult ?

    1 AnswerPhysics5 years ago
  • Why did pierre de fermat speculate his principle of least time for light, was it just out of the blue ?

    why postulate this. It gives me the impression that he thought light "knows" which way to go, as if it can make its own decisions?

    1 AnswerPhysics5 years ago
  • Binomial theorem?

    Using the binomial theorem (a+bx)^n with any n (-ve or fractional) gives an infinite series:

    Why? ,for example, why is it that for (a+bx)^-2, you can not just find (a+bx)^2 and then take the reciprocal as a^-b = 1/(a^b)

    3 AnswersMathematics5 years ago
  • The second?

    "The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom."

    First of all, surely this is random, intermittent, and second, you need to have time in the first place to deduce whether or not its intermittent. So is the second defined in this way giving rise to no advantage ?

    3 AnswersPhysics5 years ago
  • Physics: mechanics?

    A car pulls away from a petrol station with a constant acceleration of 0.4 m/s^2 down a straight road. A person arrives at a point next to the road 6 seconds after the end of the car left the same point. Find using kinematic eqns, the slowest constant speed the person has to run in order to catch the car?

    1 AnswerPhysics5 years ago
  • special relativity?

    Just because a light clock takes longer to tick when moving relative to some1 outside surely doesn't mean time itself is misbehaving, surely the error is in the clock?

    Further does time even exist?

    2 AnswersPhysics5 years ago
  • Newtons 3rd law?

    follow this link: https://uk.answers.yahoo.com/question/index?qid=20...

    and answer this please:

    read anonymous answer he says :

    "The forwards force on the horse is the frictional force of the ground on the horse's hooves", however, surely this is the same as the force that the horse is pulling the cart with, and the same as the force the cart is pulling back on the horse with, so why does the horse accelerate

    1 AnswerPhysics5 years ago
  • newton's 3rd law?

    if a horse is pulling a cart with a force f, then the cart is pulling back on the horse with that same force,

    from a carts perspective it has to forces, f and F (F being the frictional force), if f>F, the cart will accelerate .

    HOWEVER what are the forces in the x direction for the horse , their is the backward force f, but what would the forward force be ?

    2 AnswersPhysics5 years ago
  • Electricity?

    How come lightning is instantaneous if the electron velocity of a current is only a few mm/s

    4 AnswersPhysics5 years ago
  • Electricity?

    If electrons move slowly in a wire @ say 10 mm/s in a circuit then how come lightning is instantaneous or sparks, how come the end of a charged rod will be instantaneously charged when the other end is put into contact with a charge?

    2 AnswersPhysics5 years ago
  • Dark matter?

    Is The only reason ppl believe this may exist because our current theories fail, just bcuz our theory of gravity doesn't explain observations of the mass of galaxy's, how can you simply say "well lets add something in called dark matter", and slap it on the side just to make a failed theory correct, why assume their is something called dark matter in the first place, cant we just start from the drawing board again?

    2 AnswersPhysics5 years ago
  • Mechanics?

    I cant seem to fathom where i'm going wrong with this :

    A string has a mass of 81.6kg at its center and is rated 24kN, if the rope is pulled down by 15 degrees, find the tension: I get 1576.4 N (I use g as 10 m/s^2). The next part of the question is the bit I cant do :

    find the maximum angle before the rope breaks, ive done multiple things with this and get back an angle of 15 degrees (assuming tension and weight behave linearly) ?

    2 AnswersMathematics5 years ago
  • Multimeter?

    I was measuring voltage on a Rapid 318DMM on setting 200m, so if I get 0.2 on that reading, what is it

    3 AnswersEngineering5 years ago
  • Integration?

    the integral of y=2 is 2x+c, but the area of the graph is 2x?

    3 AnswersMathematics5 years ago
  • Integration?

    Why does the integral of a constant become x+c, surely its just x.

    3 AnswersMathematics5 years ago