<div dir="ltr">On Mon, Apr 21, 2014 at 12:49 PM, William Flynn Wallace <span dir="ltr"><<a href="mailto:foozler83@gmail.com" target="_blank">foozler83@gmail.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div style="font-family:comic sans ms,sans-serif;font-size:large;color:rgb(11,83,148)">
Thanks, I think. You do know that I last had physics in 1959 and think a vector is something related to disease spread?<br></div></div></blockquote><div><br></div><div><font size="4">Yes biologists use that word but they stole it from mathematicians and I meant it in the mathematical sense. A scalar just has a magnitude, so a real number is a scalar and so is speed (10 mph); but a vector has a magnitude and a direction, so velocity is a vector (10 mph in a northeast direction). Think of an arrow with it's length being it's magnitude and the way it's pointing the direction. <br>
<br></font></div><div><font size="4"> John K Clark <br></font></div><div><font size="4"><br><br> </font></div><div> </div></div><br></div></div>