Recent content by dustybray

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    Help interpreting a simple circuit?

    Thanks so much Adder_Noir ! That's a lot more than I could come up with, so I don't think we'll look like complete idiots when we present it... :)
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    Help interpreting a simple circuit?

    Hi, For an electronics project, my friend and I created this circuit that we found online: http://www.redcircuits.com/Page72.htm" [Broken] We had no problem putting it together, but we’re not really sure how it works. Our professor wants us to have at least a basic understanding when we...
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    Latent heat

    Thanks Astonuc-- my results seem much more realistic now :)
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    Latent heat

    I'm not sure if I'm approaching these problems correctly. Could someone check my work? Steam at 100°C is condensed in 500g of water at 20°C. a. What is the maximum amount of steam that can be condensed in this amount of water? Q[steam] = m[steam] * L[c steam] * (T[f] – T[i]) Q[steam]...
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    Doppler physics homework

    I'm having trouble solving this one: Two motorcycles are traveling in opposite directions at the same speed, when one of the cyclists blasts her horn, which has a frequency of 544 Hz. The other cyclist hears the frequency as 563 Hz. If the speed of sound in air is 344 m/s, what is the speed...
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    Sound loudspeaker intensity problems

    These questions are giving me some trouble: 6. A loudspeaker at a rock concert generates 1 x 10^-2 W/m^2 at 20 m at a frequency of 1.0 kHz. Assume the speaker spreads its energy uniformly in all directions. a. What is the intensity level in dB at 20 m? b. What is the total acoustic...
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    Harmonic motion unknowns

    Ok, I'm not sure if I understood, but I've reworked the problems: For this problem, I hope I used logical mathematics and not contrived black magic... 4. A block attached to a spring with unknown spring constant oscillates with a period of 2.0 s. What is the period if : T =...
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    Harmonic motion unknowns

    Hi, I'm having trouble with this problem because I don't know how to deal with all these unknowns: 4. A block attached to a spring with unknown spring constant oscillates with a period of 2.0 s. What is the period if : a. The mass is doubled? b. The mass is halved...
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    A couple of problems

    Hi, I’m having a really difficult time in physics, and I need some help on this homework assignment. Here are the questions and the work I’ve done. I really don’t know how to approach them, and at this point, I’m just kinda throwing equations at them haphazardly… 5. A 175 kg weather...
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