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minimoo

  • 3 years ago

PLEASE HELP medical x-rays, with a wavelength of about 10^-10m, can penetrate completely through your skin. Ultra violet rays, which cause sunburns by penetrating only the top level of skin, have a wavelength about 1000 times the wavelength of an x-ray. find the wavelength of ultraviolet rays. show your work. Hint: scientific notation.

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  1. AravindG
    • 3 years ago
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    first did you get the wavelength of ultraviolet rays ?

  2. minimoo
    • 3 years ago
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    no i was going with 1000 x 10^-10 but thats not right.

  3. AravindG
    • 3 years ago
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    you are right !

  4. minimoo
    • 3 years ago
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    thats all i do?

  5. AravindG
    • 3 years ago
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    now just ensure you report answer in scientific notation

  6. AravindG
    • 3 years ago
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    ie in the form \[a \times 10^b\]

  7. manishsatywali
    • 3 years ago
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    |dw:1359548779460:dw|

  8. manishsatywali
    • 3 years ago
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    i have just use the scientific notation form

  9. minimoo
    • 3 years ago
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    so i dont have to solve it? and @manishsatywali why +3 to the exponent?

  10. AravindG
    • 3 years ago
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    @manishsatywali we at openstudy do not appreciate giving direct worked out answers like that .Instead help the user get to the answer. Refer openstudy COC http://openstudy.com/code-of-conduct

  11. manishsatywali
    • 3 years ago
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    I HAVE USED THE PROPERTY : M ^n * M ^ b = M ^(n+b)

  12. minimoo
    • 3 years ago
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    ???

  13. manishsatywali
    • 3 years ago
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    here M = 10 and n = 3 , b = -10

  14. manishsatywali
    • 3 years ago
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    did u get that ?

  15. minimoo
    • 3 years ago
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    whats the n for?

  16. manishsatywali
    • 3 years ago
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    n = 3

  17. manishsatywali
    • 3 years ago
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    10^3 * 10^(-10)

  18. minimoo
    • 3 years ago
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    but why do you need 10^3? where does it come from in the problem?

  19. manishsatywali
    • 3 years ago
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    1000 = 10 ^3

  20. minimoo
    • 3 years ago
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    wouldnt that be 1 x 10^3?

  21. AravindG
    • 3 years ago
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    \[10^3=1 \times 10^3\]

  22. manishsatywali
    • 3 years ago
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    @AravindG IS RIGHT DO U FOLLOW HIM NOW ?

  23. minimoo
    • 3 years ago
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    so thats how i get the -10+3?

  24. manishsatywali
    • 3 years ago
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    yup

  25. AravindG
    • 3 years ago
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    yep :)

  26. manishsatywali
    • 3 years ago
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    now u understand what i was trying to say

  27. minimoo
    • 3 years ago
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    so it would be (1 x 10^-10)(1 x 10^3) ? which simplifies to 1 x 10^-7?

  28. minimoo
    • 3 years ago
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    right?

  29. manishsatywali
    • 3 years ago
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    yes u got it

  30. minimoo
    • 3 years ago
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    ok :) thanks.

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