The first property is sound can travel in all directions. Mr Wong had a 1 meter ruler and a soccer ball he doped the ball from every direction and all the meter cept on changing.
The second property is sound can travel in all corners. Mr Wong clapped from the front of his computer the meter went up but when Mr Wong clapped from the back of the wall the meter went low.
The third one is sound dissipates as it travels. When Mr Wong bounce the ball one meter away from his computer the went 80 dB. But when he went away from his computer it went to 59 dB.
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