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The influenza A virus is a spherical virus

  1. Sep 4, 2011 #1
    1. The problem statement, all variables and given/known data[/b]
    A typical virus is a packet of protein and DNA (or RNA) and can be spherical in shape. The influenza A virus is a spherical virus that has a diameter of 85 nm. If the volume of saliva coughed onto you by your friend with the flu is 0.044 cm3 and 10−9 of that volume consists of viral particles, how many influenza viruses have just landed on you?

    2. Relevant equations

    3. The attempt at a solution

    Could some one show me how to convert the .044 cm3 to nm3
    I know that .044 cm3 equals 4.4e^-8 m^3
    so what do I then after?
  2. jcsd
  3. Sep 4, 2011 #2


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    Re: conversion

    According to Wikipedia, a "nanometer", 1 nm, is 1 billionth, or [itex]10^{-9}[/itex] m. A cubic nanometer, then, is [itex](10^{-9})^3= 10^{-27}[/itex] cubic meter.

    A cubic cm is, of course, [itex](10^{-2})^3= 10^{-6}[/itex] cubic meter.
  4. Sep 4, 2011 #3
    Re: conversion

    So .044 cm3 is equal to 4.4e^-21?
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