Sound

Question 1

Non-vibrating objects produce sound waves

Answer 1

False

Question 2

Alternating compressions and rarefactions of materials produce sound waves. True
d. The SI unit if frequency is HZ.

Answer 2

True

Question 3

A sound wave frequency is the number of wavelengths that pass a given point at one
second

Answer 3

True

Question 4

The speed of the soundwaves increases when the force between particles decreases.

Answer 4

False

Question 5

As the temperature of material increases, the speed of sound wave increases.

Answer 5

True

Question 6

The inner ear converts vibrations to nerve signals that travel into the brain.

Answer 6

True

Question 7

The middle ear collects the sound waves

Answer 7

False

Question 8

Echo

Answer 8

An echo is a reflected sound wave

Question 9

Pitch

Answer 9

The perception of which how high and how low a sound is.

Question 10

WaveLength

Answer 10

A distance between a point on a wave and the nearest point just like it.

Question 11

Predict whether a barking dog produces sound waves that travel faster during day or night. Justify your answer.

Answer 11

During day since temperature affects the speed of sound waves whereas temperature increases, the speed of the sound waves increases.

Question 12

If a sound wave travels 1620 m in 3 seconds, calculate its speed. Speed = distance / time

Answer 12

1620/ 3 = 540 m/s