1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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


    User Avatar
    Science Advisor

    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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook