Recent content by tdk

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    Calculating Power & Energy of a Flashlight Bulb

    Homework Statement a flashlight bulb is connected across a 3.0-V difference in potential. The current through the lamp is 1.5 A. a. what is the power rating of the lamp? b. how much electric energy does the lamp convert in 11 minutes? Homework Equations P=I*V The Attempt at a...
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    R"Find Power Dissipated by 8A Toaster Connected to 120V Source

    Ohh yeah, I'm sorry that's what I meant to say in my previous post. I understand now,Thanks for your help!
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    R"Find Power Dissipated by 8A Toaster Connected to 120V Source

    yes i read your post, you said P = V^2 / R. But I don't know what R is
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    R"Find Power Dissipated by 8A Toaster Connected to 120V Source

    is the equation i have to use p=I/V?
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    R"Find Power Dissipated by 8A Toaster Connected to 120V Source

    Homework Statement the current through the toaster connected to a 120-V source is 8 A. What power is dissipated by the toaster? Homework Equations I=V/R The Attempt at a Solution v=120 A=8 I=(120)?
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    Ocean Depth Calculation Using Sonar

    The speed of sound in water is 1498 m/s. A sonar signal is sent from a ship at a point just below the water surface and 1.80 s later the relfected signal is detected. How deep is the ocean beneath the ship?
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    Calculating the Width of a Valley Using Echo Time Delay

    alright pugfug, I told you I unclicked the "Automatically parse links in text" and that's why the link wasnt clickable anymore. And now everytime I post I unclick it so it doesn't come up as a link. Do you understand that? I don't get why I can't post here if the link isn't even clickable...
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    Calculating the Width of a Valley Using Echo Time Delay

    But I don't understand how you apply the speed of sound to the problem. Do you multiply it by 2?.
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    Calculating the Width of a Valley Using Echo Time Delay

    Homework Statement "A rifle is fired in a valley with parallel vertical walls. The echo from one wall is heard 2.0 s after the rifle was fired. The echo from the other wall is heard 2.0 s after the first echo. How wide is the valley? Homework Equations I don't know any relevant equations...
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    Wave Speed: Calculating with 2.2 m & 31 s

    Sorry guys I know I am like kinda slow at this, I just suck really bad at physics and math in general really
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    Wave Speed: Calculating with 2.2 m & 31 s

    Ok so would I do 4.4 x 31? Or do I have to incorporate the 18 in there somewhere?
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    Wave Speed: Calculating with 2.2 m & 31 s

    Homework Statement A group of swimmers is resting in the sun on an off shore raft. They estimate that 2.2 m separates a trough from an adjacent crest of surface waves on a lake. They count 18 crests that pass by the raft in 31s. How fast are the waves moving?Homework Equations F= 1/t...