A cord of mass m and length L is hanging vertically. A pulse travels from the lower end to the upper end of the cord in

[answerhappygod]

A cord of mass m and
length L is hanging vertically. A pulse travels
from the lower end to the upper end of the cord in an approximate
time interval
Δt = 2sqrtL/g with speed that varies with position x
measured from the bottom of the cord as v= sqr(tgx) assume the
linear equation describes at all locations on the cord
A- over what time interval does a pulse travel two-thirds of the
way up the cord? give your answer as a fraction of the quantity
dalta t = 2sqrt (L/g)??
B- a pulse starts traveling up the cord, how far has it traveled
after interval sqrt (L/g)