Question

Answers this please urgently need​

Answer 1

Answer:

iii ) 4 / 0

Step-by-step explanation:

option 3 is not a rational number because rational number can be written in p/q form where q doesn't equal to zero

Answer 2

Answer:

Frequency of oscillation of string in n

th

harmonic is

2l

nc

.

where c is the speed of the wave in the string.

Since the string vibrates in 4 segments, n=4

400=

2l

4c

⟹

2l

c

=100

Fundamental frequency f

1

=

2l

1×c

=100Hz