理化第三冊---第二回
Quiz
•
Science
•
6th - 8th Grade
•
Hard
張士元 張士元
Used 3+ times
FREE Resource
30 questions
Show all answers
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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