Recent content by eraemia

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    Impact of Temperature on Fuel Cell Work Output

    Homework Statement 2 H2(g) + O2(g) 2 H2O(l) K = 1.28e83 As temperature increases, does the maximum amount of work obtained from the fuel cell reaction increase, decrease, or remain the same? Homework Equations 1. G = -RTln(K) 2. dG = dH - tdS 3. w_max = dG The Attempt...
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    Half-cell / reduction potential?

    Could anyone give me some pointers regarding this problem? Half-cell Xn+/X is connected with half-cell Yn+/Y and the potential difference is found to be 0.12V with Y being the positive electrode. Yn+/Y is connected with Cu2+ and the potential difference is found to be 0.13V with Cu being the...
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    Undergrad How to Prove A v C in Symbolic Logic?

    What class is this for? What does vINTRO mean?
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    Undergrad Can Symbolic Logic Rules of Inference and Replacement Solve These Problems?

    To solve these problems, I would recommend you to look at the conclusion first and work backwards from there. (1) 1. (A > E) > C ____________Premise / Conclusion: A 2. C > ~C ____________Premise 3. ~C v ~C ____________CE 2 4. ~C ____________DUP 2 5. ~(A > E) ____________MT 1 6. ~(~A v...
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    Solving Tension Force in Plank Supported by Cables

    Homework Statement A strong plank 8.0 m long and having a negligible mass is supported by steel cables from both ends. A jaguar with a weight of 800 N stands 2.0 m from one end. What is the tension force in the cable farthest from the jaguar? a. 120 N b. 200 N c. 240 N d...
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    Power of Energy Transfer: Solving a 3D Vector Problem

    Homework Statement An object moves with a velocity of [4 m/s,-1 m/s, 3 m/s] and is acted on by a force of [-5 N, 0, +5 N]. What is the power of the energy transfer in this interaction? a. -35 W b. -5 W c. 0 d. +5 W e. +35 W Homework Equations p = Fv The...
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    How Close Does the Little Atom Get to the Big Atom in the Energy Bond Scenario?

    Homework Statement Consider a potential energy curve and system as shown in Figure C11.5. Imagine that the little atom approaches the big atom from infinity with an initial kinetic energy K=5x10-21 J. How close to the big atom does it get? a. x=0 b. x=0.04 nm c. x=0.11 nm...
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    Rotational Kinetic Energy -> Lightning Speed Running?

    Thanks for your help!
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    Rotational Kinetic Energy -> Lightning Speed Running?

    Or do I find v with v = rw? (but that wouldn't relate to energy? I'm terribly confused)
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    Rotational Kinetic Energy -> Lightning Speed Running?

    Homework Statement Suppose a solid cylindrical flywheel has a mass of 200 kg and a radius of 0.8 m and rotates at a rate of 15,000 revolutions per minute. If you were able to convert all of its rotational kinetic energy into making you run, how fast would you be going? (Assume your mass is...
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    Heat or Work: Changes in Thermal Energy

    well i figured out 2 .15*790 = 118.5 J/K .15*4186 = 627.9 J/K [ (118.5)(373K) + (627.9)(273) ] / (118.5+627.9) = 16 C so it's false but about 1, i know the definitions of heat and work but is my thinking correct, that both b and c are demonstrations of heat, whereas a and d that of...
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    Heat or Work: Changes in Thermal Energy

    BRITNEY SPEARS: Heat or Work? Homework Statement 1. Which of the following represent a change in an object's thermal energy due to the flow of heat, rather than work being done on the object? You may choose more than one response. a. Liquid nitrogen poured on a slab of ice boils...
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    Which has the larger moment of inertia?

    alright, i think i get it now. thanks
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    Which has the larger moment of inertia?

    ok so the thin spherical shell would have a moment of inertia of 2/3 MR^2 whereas the solid sphere would have 2/5 MR^2 therefore the bicycle has more inertia
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    Which has the larger moment of inertia?

    Homework Statement Two wheels have the same total mass M and radius R. One wheel is a uniform disk. The other is like a bicycle wheel, with lightweight spokes connecting the rim to the hub. Which has the larger moment of inertia? a. The solid disk b. The wheel with spokes c...