KHTN 7 - BÀI TẬP CHỦ ĐỀ 5
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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10 questions
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1.
FLASHCARD QUESTION
Front
Ô nhiễm tiếng ồn?
Back
Bệnh viện, trạm xá cạnh chợ.
2.
FLASHCARD QUESTION
Front
Âm phát ra càng to khi
Back
Nguồn âm dao động càng mạnh.
3.
FLASHCARD QUESTION
Front
Biên độ dao động của vật là
Back
Độ lệch lớn nhất của vật dao động so với vị trí cân bằng.
4.
FLASHCARD QUESTION
Front
Âm thanh không thể truyền qua môi trường nào?
Back
Chân không.
5.
FLASHCARD QUESTION
Front
Con lắc đơn có chiều dài 50 cm, 60 cm, 70 cm, 80 cm. Tần số dao động lớn nhất là con lắc nào?
Back
50 cm
6.
FLASHCARD QUESTION
Front
Tần số âm thanh mà tai người nghe được?
Back
Từ 20 Hz → 20 000 Hz.
7.
FLASHCARD QUESTION
Front
Một vật trong 2 giờ thực hiện 7 200 dao động. Tần số:
Back
1Hz
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