I need someone to help me who is really really good at algebra!!

Question

anonymous · Answer

are any of ya'll really good at algebra?

anonymous · Answer

If you post the problem, most of us can probably help...

anonymous · Answer

and the russian bear!

anonymous · Answer

OKAY hold on ya'll I'm about to put it up. :)

anonymous · Answer

TASK 1 


MEDICAL X RAYS, with a wavlength about $$10^{-10}m$$ , can penetrate completeyly through your skin.

Ultravilet rays which cause sunburns, by penetrating only the top layer of skin , have a wavelength about 1000 times the wavelength of a x ray. Find the wavelength of ultraviolet waves. Show your work. 

The wavelengths of visiable light are between $$3.8 x 10^{-7}m$$ and $$7.6 x 10^{-7}m$$
Are these wavelengths longer or shorter than those of ultraviloet waves? Explain.

anonymous · Answer

Do ya'll know this?:/

whpalmer4 · Answer

Yes.  It's pretty straightforward arithmetic.

Wavelength of medical x-ray is $10^{-10} \text m$Ultraviolet light has a wavelength that is about 1000 times that of a medical x-ray, so the wavelength of the UV light is just

$$1000*(10^{-10} \text m) = 10^3*10^{-10}\text m = 10^{3-10}\text m = 10^{-7}\text m$$

Easy, wasn't it?  Do you remember the multiplication properties of exponents with a common base?
$$a^n*a^m = a^{n+m}$$