Recent content by Great-dane

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    High School Energy in Vibrations: 100Kg at 10Hz & 10mm/s

    They should be valid, they are from real life! Anyway, I have found the formula for energy in a "standing" sinus curve!
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    High School Energy in Vibrations: 100Kg at 10Hz & 10mm/s

    Gear 300, what do you think?
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    High School Energy in Vibrations: 100Kg at 10Hz & 10mm/s

    It is from a vibration test on the aft part of a ship! BPF=Blade Passing Frequ.. ME=Main Engine The ship vibrates every time a propeller plade passes and I'm trying to finde the energ which is lost. The mass is imposible to know due to the structure of the ship, but i have a estimate saying...
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    High School Energy in Vibrations: 100Kg at 10Hz & 10mm/s

    Thanks for your answer! Welllll, I'm trying to work out how much energy there is in ex. "5*BPF" (see the att.). Let's say the mass is 100kg! Is ti as simple as E(kin)?
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    High School Energy in Vibrations: 100Kg at 10Hz & 10mm/s

    Anyone?
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    High School Energy in Vibrations: 100Kg at 10Hz & 10mm/s

    Hi people can anyone help me? I need to know how much energy it takes to vibrate a mass at a frequency and speed. How much energy is there in a mass of ex. 100Kg at 10Hz and a speed of 10mm/s ? Tangs!
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    Undergrad Electrical resistance of Earth

    Hay again I don’t think Gauses law can be used here, I never liked him so normally I don’t use him ;). I am sorry but I don’t think I can help you. If what I said earlier is true (the Earth being a big cable with an A=inf.) ohms law suggests that there wouldn't be no loss! Are you sure that...
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    Undergrad Electrical resistance of Earth

    Normally you wouldn’t consider calculating earth. Earth is a quit good conductor and is considered as a close to ideal resistance. When doing calculations on safety systems, such as HFI and PHFI you only use the transition resistance, which is locally defined by the soil, moist, type of cable...
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    Designing a Mousetrap Car for Optimal Distance: A Physics Project

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    High School Can Static Attraction and Magnetic Attraction Coexist?

    Ok, Quantum! Thanks for your time!
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    High School Can Static Attraction and Magnetic Attraction Coexist?

    Okay, that would explain electromagnetism! So a static field consists of "non moving" electrons! And a magnet consists of molecules with moving electrons, is that right/the answer to why they won't interact?
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    High School Can Static Attraction and Magnetic Attraction Coexist?

    Anyone?
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    Brake Rotor Heat: Calculating Temperature for 120kg Object at 30mph

    I would think you would have to know the exact airflow and turbulance around the break, the air temp. and the air hum. You would need a big computer progran such as SolidWorks to simulate it! With a price tag of around 10.000dollers fore a single user program, it might be a little much! I think...
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    Brake Rotor Heat: Calculating Temperature for 120kg Object at 30mph

    E(kin) = ½*m*v*v m=120kg v=14m/s (30mph) E(kin)=11760Jouel You need to know which material you are using. For the given material you can find how much energy you need to heat one kilogram one degree celsius (or which ever scale you crazy americans use) ;-)
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    High School Understanding Capacitor Charging: Basics for Beginners

    Try the links for an easy and quick exp.: http://www.youtube.com/watch?v=t9Qwx75eg8w&feature=related and http://www.youtube.com/watch?v=_PhQu5oQIKs&feature=related