کارت شما خالی است
The wave phenomena of sound
The wave phenomena of sound
When does echo form? Why does sound spread easier at night? What is the secret to a good concert hall?
فيزيك
Grades 5 – 8
نویسنده: Tóth Katalin
Graphic designer: Farkas Ágnes
کلیدواژهها
موزالينک
/لينک وب