What is meant by normal modes?

997

---

What is sonar ( sound navigation and ranging )?

984

---

For what the parabolic dishes are used?

908

---

How does a sound wave travel in air?

981

---

What is acoustics?

922

---

What is the wavelength of sound in air?

934

---

What is loudness of sound?

987

---

What is the musical sound?

1079

---

What is the pitch?

929

---

What is sound velocity?

1028

---

Who first detected radio waves?

954

---

What is the formula of velocity?

919

---

The velocity of sound in gas depends upon what?

924

---

What is frequency of sound in air?

1042

---

What is speed of sound through water?

961

---