1. A sound wave travels through a liquid, a solid, and a gas as shown in the diagram. Which of the following physical quantities of the wave remains unchanged in the three media? 如圖所示,一列聲波經過一個液體、固體及氣體介質。以下哪個物理量在這三個介質中均不變?

聲波多項選擇題

Quiz
•
Physics
•
9th Grade
•
Hard
Yan Lau
Used 1+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Amplitude振幅
Wavelength波長
Frequency頻率
Velocity速度
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2. The figure shows an experimental set-up for the demonstration of the speed of sound. The electronic stop-clock can be turned on when microphone X receives a sound and it can then be turned off when microphone Y receives the same sound. The distance between X and Y is 5 m. A student claps his hands just next to X and the electronic clock records a time interval of 0.015 s. The speed of sound determined by the experiment is
2. 圖中展示了用於展示聲音速度的實驗設置。當麥克風 X 收到聲音時,電子秒表可以開啟,然後當麥克風 Y 收到相同聲音時可以關閉。X 和 Y 之間的距離為 5 米。一名學生在 X 旁邊拍手,電子時鐘記錄了一個時間間隔為 0.015 秒。由實驗確定的聲音速度是
330
333
340
667
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3. A thunder is heard 1.5 s after a lightning is seen. What is the distance between the observer and the place where the lightning occurs?
3. 一道閃電被看見後 1.5 秒後聽到了一次雷聲。觀察者和閃電發生地點之間的距離是多少?
4.5*108
2.25*108
510
255
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A boy measures the speed of sound of air. Initially he is at position P in front of a cliff. He shouts loudly and at the same time he starts his stop-watch. He stops his stop-watch once he hears the echo from the cliff. The time interval measured is 0.6 s. He then walks away from the cliff for a distance of 70 m to position Q and repeats the above procedure. The time interval measured this time is 1.0 s.
4. What is the speed of sound measured by the boy?
一名男孩測量了空氣中聲音的速度。起初,他站在懸崖前的位置 P。他大聲喊叫的同時啟動碼錶。一旦聽到懸崖回聲,他停止碼錶。所測得的時間間隔為 0.6 秒。然後,他從懸崖向遠處行走 70 米 到位置 Q,並重複上述程序。這次測得的時間間隔為 1.0 秒。
4. 請問這位男孩測量到的聲音速度是多少?
320
330
340
350
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A boy measures the speed of sound of air. Initially he is at position P in front of a cliff. He shouts loudly and at the same time he starts his stop-watch. He stops his stop-watch once he hears the echo from the cliff. The time interval measured is 0.6 s. He then walks away from the cliff for a distance of 70 m to position Q and repeats the above procedure. The time interval measured this time is 1.0 s.
5. What is the distance between the cliff and position P?
一名男孩測量了空氣中聲音的速度。起初,他站在懸崖前的位置 P。他大聲喊叫的同時啟動碼錶。一旦聽到懸崖回聲,他停止碼錶。所測得的時間間隔為 0.6 秒。然後,他從懸崖向遠處行走 70 米 到位置 Q,並重複上述程序。這次測得的時間間隔為 1.0 秒。
5. 求位置P與懸崖的距離。
102
105
198
210
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
6. We can hear the voice of a person behind an obstacle but we cannot see the person. Which of the following statements best explains the phenomenon?
6. 我們能聽到一個人在障礙物後面的聲音,但看不到這個人。以下哪個描述最好地解釋了這種現象?
The person emits sound waves but does not emit light wave 人會放聲波但不會放光波
Sound wave can travel in a curved line but light wave can only travel in a straight line.聲波可以曲線行走,但光波只能以直線行走
Sound wave has a bigger degree of diffraction than light wave 聲波比光波有較大程度的繞射
Sound wave can penetrate through the obstacle but light wave cannot.聲波可穿透障礙物但光波不能
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
7. Sound wave can undergo diffraction more easily than light wave because
聲波較光波易進行繞射,原因是
sound wave is a longitudinal wave and light wave is a transverse wave聲波是縱波而光波是橫波
the speed of sound wave is much smaller than the speed of light wave 聲速比光速細很多
the frequency of sound wave is much smaller than the frequency of light wave聲波的頻率較光波頻率細很多
the wavelength of sound wave is much bigger than the wavelength of light wave聲波波長比光波波長長很多
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