Consider a pair of identical (typical) screws and held in opposite hands: the right pointed to your left, the left pointed to your right.

Then place them adjacent to each other (the one in your right hand "on top"), and "interleave" their helical threads together.

If I move the bolts around each other as one would twiddle ones thumbs (the top one comes toward you and the bottom one away from you), holding each screw firmly by the head so that it does not rotate, do the heads:

a) move inward
b) move outward
c) remain the same distance from each other?

You should determine the answer without resorting to the actual test

Hold on one second!!!! Hold on!

Didn't it say to hold the screws' heads and don't let them rotate? But in order for the heads to move inward or outward, doesn't it have to rotate?

Then I think you wouldn't twiddle thumbs at all. So I guess that they remain the same distance 'cause you they aren't going to be moving at all.

Right? Am I right?

Posted by ron on 2004-12-30 03:13:25