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[1] Explain how the shape of a musical instrument can affect the sound it produces. [2] What is an echo? [3] Why can we not hear ultrasound?

[1] Explain how the shape of a musical instrument can affect the sound it produces. [2] What is an echo? [3] Why can we not hear ultrasound?

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[1] Explain how the shape of a musical instrument can affect the sound it produces.

[2] What is an echo?

[3] Why can we not hear ultrasound?

[4] Why do theaters and cinemas have curtains hanging along the walls?

[5] What is noise? Name three harmful effects of noise.

[6] Name three jobs where you think people should wear ear protectors.

[7] Why can it be very harmful to live very near the part of an airport where aircraft take off?

Please do not make them very complicated, instead only detail them a bit where people can understand it. 

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