(adsbygoogle = window.adsbygoogle || []).push({}); am i in the right place???

i everyone i have a physics question but i am not sure if i am in the right place or not..... the question is:

Estimate the number of water molecules in a raindrop 1.5 mm in radius.

i really dont want you to solve it just give me the equation that i am supposed to use to solve the question.....

and again.... if i am in the wrong place...please tell me where i am supposed to post this question

thanks a lot

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# Am i in the right place?

**Physics Forums | Science Articles, Homework Help, Discussion**