Recent content by Cisneros778

  1. C

    Common temperature for thermal equilibrium

    Homework Statement One mole of copper at a uniform temp. of 0 Celsius is placed in thermal contact with a second mole of copper which, initially, is at a uniform temperature of 100 Celsius. The pressure in the system is maintained at 1 atm. The two moles of copper are thermally insulated from...
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    Vibrational energy at low temperatures

    Homework Statement I would like to get a better picture of the degree of freedom of vibration. Predicting the value of heat capacity for water vapor turns out to be 6R, but the experimental value is 3.038R In my notes it then says, "contributions to the heat capacity can be considered...
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    Degrees of Freedom: Why 3/2*RT for Kinetic Energy in a Solid?

    Thanks a lot!
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    Degrees of Freedom: Why 3/2*RT for Kinetic Energy in a Solid?

    Homework Statement I want to know why the average kinetic energy FOR A SOLID is 3/2*RT. Homework Equations For every degree of freedom = 1/2*RT Possible Degrees of freedom are: Translation, rotation, vibration The Attempt at a Solution In a solid, I am certain there is vibrational energy...
  5. C

    Need help understanding eigenvalues and eigenvectors

    Any help please?
  6. C

    Need help understanding eigenvalues and eigenvectors

    Homework Statement Find the principal stresses and the orientation for the principal axis of stress for the following cases of plane stress. σx = 4,000 psi σy = 0 psi τxy = 8,000 psi Homework Equations See picture. The Attempt at a Solution...
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    How Do R5 and R6 Affect Vo and ia in a Circuit with Parallel Resistors?

    Thank you.
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    How Do R5 and R6 Affect Vo and ia in a Circuit with Parallel Resistors?

    Homework Statement Determine ia and Vo V=0.4 V, R1 = 7kΩ, R2 = 28 kΩ, R3 = 43 kΩ, R4 = 31 kΩ Homework Equations V= i*R The Attempt at a Solution Does R5 and R 6 cancel out since the pair of parallel resistors share a common node, making Vo - 0 V?
  9. C

    Determine currents ib and ia

    Thank you, that makes sense
  10. C

    Determine currents ib and ia

    Homework Statement Determine ib and ia Ix = 0.4 mA, R1 = 15k ohm, R2 = 19k ohm, R3 = 23k ohm, R4 = 15k ohm Homework Equations V=IR The Attempt at a Solution I am assuming there are 4 unknown currents in this diagram. Ix splits into ib and i1. 0.4mA - ib - i1 = 0 i1 - i2 =...
  11. C

    Engineering Design a circuit diagram

    Yes, just on or off
  12. C

    Engineering Design a circuit diagram

    any suggestions?
  13. C

    Engineering Design a circuit diagram

    https://mail-attachment.googleusercontent.com/attachment/u/2/?ui=2&ik=c0da1462ed&view=att&th=139d7c80e1de131f&attid=0.1&disp=inline&realattid=f_h78jmhci0&safe=1&zw&saduie=AG9B_P_MKhT_3deMhgRG8lpbZ3yh&sadet=1347945000944&sads=cscxVT049sxfN8g2eBCSKNZUd3k&sadssc=1 Okay, I figured out the first...
  14. C

    Engineering Design a circuit diagram

    I actually have only two resistors to work with. I mean, the light bulbs are resistors as well, but apart from that I only get to use two resistors for my diagram. :-/
  15. C

    Engineering Design a circuit diagram

    The 2 resistors will keep all light bulbs within their allowed voltages.
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