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| To: | [email protected] |
|---|---|
| Subject: | RE: LF: Loading Coils |
| From: | Rik Strobbe <[email protected]> |
| Date: | Fri, 19 Nov 2004 10:16:37 +0100 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
That's a problem with calculating without understand what is
calculated, often they just put in a number of figures in a formula and
just accept whatever comes out even if it is absurd :
In the few month between graduating and being called for the military
service I assisted in giving exercises to the first year student (18 years).
During one of the tests they had to calculate the mass of an electron and
one of the students did it all correct except that at the certain point he
swapped a minus sign to plus and the result was at 10exp+28 gram instead of
10exp-28 gram. I told him that he had made a minor mistake but that he
should have noticed it right away.He couldn't correct the mistake until I
asked if it was possible that the mass of an electron would exceed the mass
of the earth.
73, Rik ON7YD I must confess that after all these years i do find that my calculator with all the built-in formulae (ohms law included) has made me lazy but maybe the skill is in knowing what to calculate and when Pat g4gvw |
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