If the strings have the same thickness but different lengths, which of the following parameters, if any, willbe different in the two strings?
check all that apply.

a. wave frequency
b. wave speed
c. wavelength
d. none of the above

If the strings have same thickness but different lengths then these parameters wave frequency, speed, wavelength will be different in the two strings. so the option d) None of the above is correct.

Explanation:

it takes about 30 days for it to break down