Sapling homework Question 5

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Jaclyn Dang 3B
Posts: 72
Joined: Wed Sep 30, 2020 10:02 pm

Sapling homework Question 5

Postby Jaclyn Dang 3B » Sun Oct 18, 2020 8:34 pm

Can anyone tell me what I am doing wrong in this problem? I keep trying it but it comes up as incorrect

A liquid is exposed to infrared radiation with a wavelength of 5.56x10^-4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons are required for the liquid to absorb 46.36 J of heat?

Step 1:
E=(hc)/ wavelength

= 3.58x10^-19

Step 2:

I've tried entering in but all are wrong please help :(

Andreas Krumbein 1L
Posts: 59
Joined: Wed Sep 30, 2020 10:00 pm

Re: Sapling homework Question 5

Postby Andreas Krumbein 1L » Sun Oct 18, 2020 8:46 pm

5.56x10^-4 cm converted to meters is 5.56x10^-6 m, not 5.56x10^-7 m, since you're converting to cm to m, instead of mm to m. So the answer at the end of step one will be 3.58x10^-20.

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