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4 ปี 2 เดือนAge: 14+
Level: 9-12
Language: English
(en)
ไอดี: 2201855
05/11/2022
Country code: US
Country: United States
Main content: Waves (2007533)
From worksheet author:
Frequency, wavelength, amplitude, wave speed
Other contents:
Frequency, wavelength, amplitude, wave speed
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