Recent content by Trekky0623

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    Solving for Ball Speed at Lowest & Highest Point of Arc

    Ah hah! Thank you so much. I feel silly.
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    Solving for Ball Speed at Lowest & Highest Point of Arc

    The string in the Figure is L = 118.0 cm long and the distance d to the fixed peg P is 99.1 cm. When the ball is released from rest in the position shown, it will swing along the dashed arc. How fast will it be going when it reaches the lowest point in its swing? What about the highest in its...
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    Math Proof for E=mc^2 | Find It Here

    Is there a mathematical proof or derivation for E = mc2, and if so, where can I find it?
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    Help with reversing a function

    I need to know how to start this. Basically, I'm trying to isolate x on one side, so that I can input f(x) and solve for x, instead of the other way around. Image: http://img146.imageshack.us/img146/8869/tempng8.png
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    Logarithms: ALG2 teacher say what?

    1. log(x) is equal to the number that you must raise 10 to in order to get x. 10^(log(x)) = x. Logarithms are exponents. 2. log(10) = 1, since 10^1 = 10. So 10^(log(10)) = 10^1, or 10.
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    How can you multiply two negative numbers?

    So let's assume we have a positive whole number, n. -n = -1 * n So let's just say n is 3. You're adding -1 three times (-1) + (-1) + (-1) = -3 When multiply by a negative, instead of addition, we use subtraction, so: (-1) * (-3) = -(-1) - (-1) - (-1) So (-1) * (-3) = 3
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