理化第三冊---第二回
Quiz
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Hard
張士元 張士元
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30 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
一束綠光由空氣射入水中，與空氣中相比，它在水中會發生何種改變？
波長變短，頻率不變
波長變短，頻率變大
波長變長，頻率不變
波長變長，頻率變小
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如右圖，物體由甲向右移動至乙的過程中，凸透鏡形成像的大小是否改變？
漸小
漸大
不變
視當時操作決定
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
所謂「聲紋比對」是一種辨識發音者的方法，它主要是分析聲音的什麼？
波長
音調
響度
波形
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如右圖所示，若振動頻率加倍，則波將如何變化？
振幅減少
波長增長
傳遞的時間減少
A、B兩點間波的數量增加
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
已知右圖中ac線段＝30公分，手每秒振動5次，則此繩波的波速為多少公分／秒？
150
75
50
30
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
花蓮外海賞鯨豚的船隻用聲納偵測鯨豚的蹤跡，主要是應用聲波的何種性質？
聲波的繞射
聲波的共振
聲波的反射
聲波的折射
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
某聲波頻率300Hz，由空氣傳播到水中。已知該聲波在空氣中的聲速為300m/s，在水中的聲速為1500 m/s，則該聲波在水中的波長為若干？
50m
11m
5m
1.1m
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