Monday, April 23, 2012

Module 3

Assignment 5

Post the temperatures of your stars.


12 comments:

  1. Wein’s law is temperature (Kelvin) equals constant divided by peak wavelength (angstroms) [t=σ÷w]
    6000= σ ÷ 4830
    σ =28,980,000
    (L=luminosity)

    HD33278
    T=6740 K; L=1.372
    HD 124320
    T=7068 K; L=1.439
    HD 31084
    T=6440 K; L=1.311
    HD 242908
    T=6300 K; L=1.283
    SAO 76803
    T= 4912 K; L=1
    FEIGE 40
    T= 7245 K; L=1.475

    4 significant figures are necessary.

    ReplyDelete
    Replies
    1. J=σT^4
      HD 33278
      J= 5.98e22 Ratio=3.54
      HD 124320
      J= 7.23e22 Ratio=4.28
      HD 31084
      J= 4.98e22 Ratio=2.95
      HD 242908
      J= 4.57e22 Ratio=2.7
      SAO 76803
      J= 1.69e22 Ratio=1
      FEIGE 40
      J= 7.98e22 Ratio=4.72

      Delete
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  3. Weins law
    Temp (k) = constant/peak wavelength (angstroms)

    HD: 33278
    Temp= 4400k

    HD: 124320
    Temp= 4000k

    HD: 31084
    Temp= 4600k

    HD: 242908
    Temp= 3600k

    SAO: 76803
    Temp= 5800k

    FEIGE: 40
    Temp= 3800k

    ReplyDelete
  4. Wein's Law
    Temp(K)=constant/Max wavelength(A)

    HD: 33278
    Temp=6700k

    HD:12430
    Temp=7500k

    HD:31084
    Temp=6700k

    HD:242908
    Temp=8100k

    SAO:76803
    Temp=4500k

    FEIGE:40
    Temp=7700k

    ReplyDelete
  5. weins law
    temp(k)=constant/peak wavelength(a)
    HD 33278
    Temp=4300k

    HD 124320
    Temp=4100k

    HD 31084
    Temp=4200k

    HD 242908
    Temp=3700k

    HD76803
    Temp=6700k

    HD 40
    TEMP=3900K

    ReplyDelete
  6. Energy of Star

    OT^4

    5.67*10^-8 * 2.01*10^15= 11.40*10^7
    5.67*10^-8 * 3.16*10^15= 17.92*10^7
    5.67*10^-8 * 2.01*10^15= 11.40*10^7
    5.67*10^-8 * 4.30*10^15= 24.38*10^7
    5.67*10^-8 * 4.10*10^14= 23.25*10^6
    5.67*10^-8 * 3.52*10^15= 19.96*10^7

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  9. The Stefan-Boltzmann Radiation Law E=σT^4
    1. E= (5.67x10^-8)(4400)^4
    E= 21251704.32

    2. E= (5.67x10^-8)(4000)^4
    E= 14515200

    3. E=(5.67x10^-8)(4600)^4
    E= 25387175.52

    4. E=(5.67x10^-8)(3600)^4
    E= 9523422.72

    5. E=(5.67x10^-8)(5800)^4
    E= 64164532.32

    6. E=(5.67x10^-8)(3800)^4
    E= 11822721.12

    ReplyDelete
  10. 1-1.9X10^15
    2-1.6X10^15
    3-1.7X10^15
    4-1.0X10^15
    5-1.1X10^16
    6-1.3X10^15

    ReplyDelete