Recent content by giggidygigg

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    Graduate What does translational energy have to do with entropy change?

    I know that the translational energy of gas can be represented by 3/2NkT where N = number of molecules, k = boltzmann's constant, T = temperature my textbook says that the change in entropy is (delta)S = (integral from 1 to 2) dS = (integral from 1 to 2) dU/T + (integral from 1 to 2) PdV/T...
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    What is the stopping distance of the car?

    seems like you got it right.
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    Circular motion with a string with weight

    oops i meant m2. but anyway i'll try to carry it out with your advice
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    Climber hanging from a cliff and acceleration

    friction opposes relative motion. the rock wants to move in the direction of the tension of the rope, but the friction opposes it, which means its direction is opposite.
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    Solving for Tension in an Inclined Plane System with Two Connected Blocks

    yeah actually i don't see how the blocks aren't moving because they should with those given quantities. problem was a little ambiguous on whether or not the blocks were moving. instead of making the sum of the forces equal to 0, make it equal to what it should be when the blocks are moving...
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    Solving for Tension in an Inclined Plane System with Two Connected Blocks

    draw a force diagram for each blocks to see what forces are acting on them. As you said, the sum of these forces must be 0 because the blocks aren't moving.
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    Circular motion with a string with weight

    Homework Statement A block of mass m2 is attached to a cord of mass m1 and length L, which is fixed at one end. (Note, not a massless cord!) The block moves in a horizontal circle on a frictionless table. If the period of the circular motion is P, find the tension in the cord as a functions of...