☰ Contents · Physics

Music and noise. Chapter VII review

Lessons 67–68 · 2 lessons · N.Sh. Turdiyev. Physics Grade 6, 3rd revised edition. Niso Poligraf Publishers, Tashkent, 2017
Answers are for parents and teachers.
1
How many metres does sound go in air in 5 s (340 m/s)?
2
An echo returns in 8 s (340 m/s). Distance in m?
3
Ultrasound returns in 6 s (1500 m/s). Depth in m?
4
Write in 5 sentences about the most interesting experiment you did this year.
5
Write 3 ways to reduce noise at home.