If the second harmonic of a certain string is 42 hz, what is the fundamental frequency of the string?

21 hz
42 hz
84 hz
126 hz

Explanation:

As we know that frequency of wave in stretched string is given as

here we know that

n = number of harmonics

So we have fundamental frequency given as

also for second harmonic we have

n = 2

so we have

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer