🚀 go-pugleaf

Another high school physics question that I had a hard time answering.

Look at a standing wave on a slinky. The nodal points are stationary. How does
the disturbance get from one side of a nodal point to the other if that point
isn't able to move?  It would seem that any disturbance would be stopped when
it reaches a node.

Also, if two transverse pulses (congruent) are sent from bot ends on the same
        Sorry - start again

If two congruent pulses are sent on Opposite sides of the spring
simultaneously they cancel exactly at one moment in time. Is there any way to
know whether, after that instant, the waves continue in the same direction
they were moving or in fact "bounce" off each other and return to their
respective starting ends.

Any help on these would be appreciated. Thanks.  David Abineri