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Mr. Bellerillo Chp 2
Mr. Bellerillo: Sound: chapter 2 study guide
| Question | Answer |
|---|---|
| How is sound produced? | Sound is produced when matter vibrates. |
| Sound travels as what type of wave? | Longitudinal wave |
| Sound waves require a _____________ to be transmitted? | Medium |
| In a sound wave, the compressed molecules of a medium are known as? | Compression |
| In a sound wave, the area where the molecules of a medium are fewer are known as? | Rarefaction |
| The speed of sound can be changed by changing one or more of what three factors of the medium. | Temperature, Elasticity, and Density |
| Which state of matter transmits sound waves the fastest? | Solids |
| Which state of matter transmits sound waves the slowest? | Gases |
| During a thunder storm, if you see lightning, count 6 seconds and hear the thunder, approximately how far away is the storm? | 1.2 miles |
| How high or low the frequency of a wave is will determine the ________________ of a sound? | Pitch |
| Sounds above normal human hearing are known as? | Ultrasonic |
| Sounds below normal human hearing are known as? | infrasonic |
| The range of normal human hearing is? | 20 Hz - 20,000 Hz |
| Movement between a receiver and the source of a sound is known as the? | Doppler Effect |
| When a race car moves toward you, the pitch will do what? | Increase |
| When a race car moves away from you, the pitch will do what? | Decrease |
| The amplitude of a sound will determine the sounds ________________? | Intensity |
| Intensity will determine how ______________ a sound will be. | Loud |
| A sound that has no pleasing quality, no identifiable pitch and no relationship between tone is known as? | Noise |
| A sound that has a pleasing quality, a definite identifiable pitch, and a repeated timing is known as? | Music |
| What does sonar stand for? | Sound Navigation And Ranging |
| How can sonar be used to determine the depth of a sunken ship? | By knowing the speed of sound in a given medium and calculating the time it takes the sound wave to make a round trip from the sensor and the object. |
| What is the formula to determine the distance of an object? | Distance = Speed x Time |
| If the speed of sound in a given medium is 5900 m/sec and the round trip time is 5 seconds, how far away is the object? | 14,750 meters |