Answer:
Time will be 19 ms so option (a) is correct option
Explanation:
We have given that mass of wire m = 50 gram = 0.5 kg
Frequency f = 810 Hz
Wavelength = 0.4 m
Velocity is given by

Amplitude is given as d = 6 m
So time 
So option (a) is correct option
card games
board games
bird watch
write a song
make a game
count stuff
throw a ball with someone
play outside
Cochlea- <span>the part of the inner ear that contains the endings of the nerve that carries information about sound to the brain.</span>