anonymous
  • anonymous
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.
Mathematics
chestercat
  • chestercat
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AravindG
  • AravindG
first did you get the wavelength of ultraviolet rays ?
anonymous
  • anonymous
no i was going with 1000 x 10^-10 but thats not right.
AravindG
  • AravindG
you are right !

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anonymous
  • anonymous
thats all i do?
AravindG
  • AravindG
now just ensure you report answer in scientific notation
AravindG
  • AravindG
ie in the form \[a \times 10^b\]
anonymous
  • anonymous
|dw:1359548779460:dw|
anonymous
  • anonymous
i have just use the scientific notation form
anonymous
  • anonymous
so i dont have to solve it? and @manishsatywali why +3 to the exponent?
AravindG
  • AravindG
@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
anonymous
  • anonymous
I HAVE USED THE PROPERTY : M ^n * M ^ b = M ^(n+b)
anonymous
  • anonymous
???
anonymous
  • anonymous
here M = 10 and n = 3 , b = -10
anonymous
  • anonymous
did u get that ?
anonymous
  • anonymous
whats the n for?
anonymous
  • anonymous
n = 3
anonymous
  • anonymous
10^3 * 10^(-10)
anonymous
  • anonymous
but why do you need 10^3? where does it come from in the problem?
anonymous
  • anonymous
1000 = 10 ^3
anonymous
  • anonymous
wouldnt that be 1 x 10^3?
AravindG
  • AravindG
\[10^3=1 \times 10^3\]
anonymous
  • anonymous
@AravindG IS RIGHT DO U FOLLOW HIM NOW ?
anonymous
  • anonymous
so thats how i get the -10+3?
anonymous
  • anonymous
yup
AravindG
  • AravindG
yep :)
anonymous
  • anonymous
now u understand what i was trying to say
anonymous
  • anonymous
so it would be (1 x 10^-10)(1 x 10^3) ? which simplifies to 1 x 10^-7?
anonymous
  • anonymous
right?
anonymous
  • anonymous
yes u got it
anonymous
  • anonymous
ok :) thanks.

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