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A horizontal stretched string, fixed at ...

A horizontal stretched string, fixed at two ends, is vibrating in its fifth harmonic according to the equation, `y(x,t)=(0.01m)sin[(62.8m^(-1))x]cos[628s^(-1))t]`. Assuming `pi=3.14`, the correct statements (s) is (are)

A

The number of node is 5

B

The length of the string is 0.25 m

C

The maximum displacement of the midpoint of the string. From its equilibrium position is 0.01 m

D

The fundamental frequency is 100 Hz

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B, C
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