Recent content by rattis

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    Graduate Horn Antenna Radio Interferometer

    If anyone is interested, it works exceptionally well. Interference fringes are observed, and when sweeping the southern horizon, a pattern that is significantly similar to that obtained with a standard parabolic reflective dish is observed.
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    Graduate Horn Antenna Radio Interferometer

    Got this setup and it actually works! One can see some excellent fringes when a person walks past it, and there's certainly some stuff going on when a sweep of the sky is made. can anyone give me an equation relating the intensity of the em radiation detected and the size/angle of the horns...
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    Graduate Horn Antenna Radio Interferometer

    This is a strange experiment (or not so compared to some of the experiments I've done) that I am currently undertaking, and require your help. I have built an interferometer of sorts. Two metal funnels of diameter 200mm are attached together by copper tubing (20mm?) through a Y junction with...
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    Measuring waterwheel efficiency

    Thanks a lot. Initially i am using a model and the water is flowing down a 'slide' coming from the tap. As the model is not very good the water sprays all over the place, so energy entering and leaving the system is hard to find
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    Measuring waterwheel efficiency

    How did British engineer John Smeaton measure the efficiency of an overshot waterwheel? I am doing an experiment with overshot waterwheels to find their efficiency, and found that John Smeaton measured their efficiency at about 65%. However I have no idea how he got this number, and I cannot...
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    Particle physics most important physicists

    As in how we got to where we are today.
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    Particle physics most important physicists

    I was wondering who you thaught is most responicle for todays development of particle physics?
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    Undergrad Torricelli's Theorem: Flow Rate from Containers

    Apparently Torichelli made a therom that has something to do with flow rate out of containers. Can anyone help me with this as i am doing the same experiment using differential equations.
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    What is the Latest Update on Hurricane Jeanne's Path Towards Florida?

    You got to love the UK, no hurricanes here. but we get no sun
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    Why is the Irish Lottery considered to have better odds than other lotteries?

    My friend came up with a good idea. He said that intead of paying £1 a week for a ticket, save up the money and pay £52 on 52 tickets all in one week. Or you could just keep the £52 as your winnings.
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    High School Become a Physics/Math Expert: Tips for Exam Prepping

    You need a genuine interest. And imagination is just as important as intelligence.
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    Coursework Ideas: Researching, Experiments, Predictions & Variations

    Im at UK college, studying A2 Physics(Salters Horners). I get from now until Febuary to research and prepare, then i have 2 weeks to experiment and a further 2 weeks to write the documentation. The experiment will get a slight grading, but the main marks are for the documentation and physics...
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    Coursework Ideas: Researching, Experiments, Predictions & Variations

    I am currently researching ideas for my final year coursework. I can do any experiment I like, as long as it is done at the lab, with the equipment that the lab has. I can buy/make equipment if I fund it myself. The trouble with this is that I don't know what experiment to do as the choice is...
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    Undergrad Excel help with error bar formula

    Is the error so small that it is no showing up against the thinkness of the line? I usually calculate the percentage error then enter the value in the options of the graph (right click on trendline, i think)
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    High School A-Level Physics: Explaining Resistance to a 15-Year-Old

    I am currently finishing my first year of an A-level in physics. (Previous posters have outlined the course content well.) I have also taken Computing, Maths and Further Maths this year. Next year I will take A2 Physics, A2maths and A2 further maths, and AS electronics. I would recommend that...