
聲音的概念
Quiz
•
Physics
•
2nd Grade
•
Practice Problem
•
Hard
王馨逢 王馨逢
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
聲音必須透過物體的什麼而產生?
振動
電流
熱能
光線
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
振動的次數稱為振動「頻率」的單位是?
秒
Hz
分鐘
小時
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
振動速度越快,頻率越高,音調是越高還是越低?
無法確定
不變
越低
越高
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如果物體振動的頻率每秒鐘低於20次,或高於20000次,則耳朵無法聽到。這是真還是假?
真
假
無法確定
需要更多資訊
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
狗的振動頻率範圍是多少次/秒~多少次/秒?
10次/秒~500次/秒
30次/秒~6000次/秒
15次/秒~5000次/秒
20次/秒~4000次/秒
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
共振是指甲物體發出聲音時,乙物體也會產生振動。這是真還是假?
假
無法確定
需要更多資訊
真
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
音速在20℃時每秒多少公尺?
342公尺
343公尺
344公尺
345公尺
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