Weight = (mass) x (gravity)
= 200 Newtons.
(About 44 pounds. You're very skinny.)
Where is the cube I don't see any picture?
Answer:

Explanation:
= Change in frequency = 2.1 Hz
= Frequency of source of sound = 440 Hz
= Maximum of the microphone
= Speed of sound = 343 m/s
= Time period = 2 s
We have the relation

Amplitude is given by

The amplitude of the simple harmonic motion is
.