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

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Other answers:

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

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