John Smith wrote:
Now, if I construct this tank for, say 10m, and it is ~28-32 inches in
physical length, and tuned with a cap at the end, how can I know where
the standing waves are/is? Should I "picture" this as if it were a real
1/4 wave at 10m, and the wave is "compressed?" ... Your best ideas?

All that is required to achieve resonance in a distributed
network is that (in phasor notation) (Vf+Vr)/(If+Ir) be purely
resistive. Use your imagination to figure out if that always
implies 90 degrees.
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73, Cecil http://www.w5dxp.com