Recent content by PHYclueless

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    Looking for verification on a momentum & collision problem

    Here is the problem: Runner1 is going 20 degrees NofE with a mass of 60kg and v=5m/s. Runner2 is going 20 degrees NofW with a mass of 80kg and v=4m/s when they collide. What are their respective momentums prior to the collision? What is their final velocity and direction after collision if...
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    What is the Power Output of a Bird's Song?

    Got it! Thank you. I was thinking of it as an area of a circle instead of a sphere and after you said that it made me realize I needed to use a different formula. I=Pav/4(pi)(r^2). Thanks to you both :). Appreciate it.
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    Solving a Heat/Energy Problem: Final Temp of Steam

    Hello all. I have two questions I need help with but I'll post them in separate posts. I'll attach the problem and the work I've attempted. If someone could give me another idea I'd appreciate it. Thank you! To make steam, you add 5.6x10^5J of heat to .220kg of water at an initial...
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    What is the Power Output of a Bird's Song?

    Thank you so much for your help. So basically I need to use pi(r^2) and r would =.5m. I have two more questions but will post them seperatly as they relate to thermal processes and heat as it relates to energy. Thanks again for your help.
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    What is the Power Output of a Bird's Song?

    Hello. I was hoping someone could give me a direction to go with this homework problem. I'm having trouble trying to figure it out. Here's the question: Two people relaxing outdoors listen to a bird sing. One person, only 1.00m from the bird, hears the sound with an intesity of 2.80x10^-6...
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    Need help with homework problem - Archimede's principle

    Hello all. I am new to this site and was hoping someone could help me with a homework problem I'm trying to do. Here's the problem: A small ferryboat is 4.0m wide, 6.0m long. When a loaded truck pulls onto it, the boat sinks an additional 4.0cm into the river. What is the weight of the...
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