Quote:
|
Originally Posted by sluissa
either I'm doing something wrong or my slide rule is wrong or something, but near the end when you're calculating speed, no matter how I work it, when I put 1 with 3.5,
2.4 =/= 6.85 it's about 8.43 on mine.
everything else seems to work out pretty well with an error or less than 1(usually less than .1), but on that particular problem, I can't seem to get it to work
|
I think I know what is going on.
If you are working with the C + D scales, you have to move the slide (which has the C scale on it) so that the right-most index mark (the '1' on the right) on the C scale is over 3.5 on the D scale. Then move the cursor to the 2.4 mark on the D scale, and read the speed (6.85 units per second) on the C scale.
If you are using the A + B scales (which I prefer for this), put the 3.5 on the B scale underneath the middle index mark (the '1') on the A scale. slide the cursor to 2.4 on the B scale, and read the speed on the A scale.
I suspect you put the 3.5 on the B scale under the middle index of the A scale, then slid the cursor to 2.4 on the A scale, which will read 8.4 on the B scale.