When stretched string vibrates in two segments, how many nodes and antinodes will be there?

If a pheretima has 80 segments and intestine starts from 15th segments, in how many segments does the intestine extended?

Two progressive transverse waves given by y_(1) =0.007 sinpi ( 12x- 500 t ) and y _(2) = 0.07 sin pi ( 12x+500t) travelling along a stretched string from nodes and antinodes . What is the displacement at the (a) nodes (b) antinodes ? What is the wavelength of the standing wave ?

A taut string fixed at both ends vibrates in n^(th) overtone. The separation between adjacent node and antinode is equal to 'd'. Then string length is

Two unifrom strectched strings A and B, made of steel, are vibrating under the same tension. If the first overtone of A is equal to the second overtone of B and if the radius of A is twice that of B, the ratio of the lengths of the strings is