Term
| pressure variation that is transmitted through matter |
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Definition
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Term
| Why do sound waves move through air? |
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Definition
| a vibrating source produces regular variations (oscillations) in air pressure |
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Term
| Why is sound a longitudinal wave? |
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Definition
| the motion of particles in air is parallel to the direction of the wave's motion |
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Term
| What is the speed of sound at sea level and room temp? |
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Definition
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Term
| What is room temperature? |
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Definition
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Term
| Since the speed of sound depends on the temperature, how much does the speed increase for each one degree increase in temperature? |
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Definition
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Term
| Where is the speed of sound greater than in gases? |
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Definition
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Term
| Why can't sound travel through a vacuum? |
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Definition
| there are no particles to collide |
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Term
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Definition
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Term
| the kinetic energy of vibrating air particles |
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Definition
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Term
| What is a microphone which converts sound waves into electrical energy? |
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Definition
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Term
| What is an example of a detector that receives pressure waves and converts them to electrical impulses? |
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Definition
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Term
| What is the outer fleshy part of the ear? |
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Definition
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Term
| Through which part of the ear is sound channeled? |
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Definition
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Term
| Where does sound cause vibrations at? |
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Definition
| the tympanic membrane (eardrum) |
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Term
| What are the three smallest bones in the body? |
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Definition
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Term
| Where do the three smallest bones in the body transfer vibrations to fluids? |
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Definition
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Term
| The tiny hairs lining the spiral shaped cochlea detect what? |
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Definition
| certain frequencies in the vibrating fluid |
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Term
| What do the tiny hairs that line the cochlea do? |
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Definition
| stimulate nerve cells with send impulses to the brain (sound) |
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Term
| Who played a part in determining that the pitch we hear depends on the frequency of vibration? |
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Definition
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Term
| What frequency does Middle C have? |
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Definition
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Term
| What is the highest frequency most people can hear? |
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Definition
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Term
| What is the measure of the variation in pressure along a wave? |
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Definition
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Term
| What depends primarily on the amplitude of the pressure wave? |
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Definition
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Term
| What does 1 atm of pressure equal? |
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Definition
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Term
| The ear can detect pressure-wave amplitudes of less than what? |
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Definition
| one billionth of an atmosphere or 2 x 10^-5 Pa |
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Term
| What does 20 Pa of pressure-wave amplitudes do to a person? |
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Definition
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Term
| What is the unit of measurement for sound level? |
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Definition
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Term
| What is the change in frequency of sound caused by movement of either the source, the detector, or both? |
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Definition
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Term
| What of an ambulance siren is higher as the vehicle moves toward you and then dropped to a lower pitch as the source moves away? |
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Definition
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Term
| In what process do bats use the Doppler effect to locate prey? |
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Definition
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Term
| What do bats use for navigation? |
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Definition
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Term
| What are some other uses of the Doppler effect? |
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Definition
| radar detectors, astronomy, ultrasound |
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Term
| What distorts the sound wave leading a sound source? |
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Definition
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Term
| What is it called when a sound source is moving faster than the speed of sound, a conical wave front? |
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Definition
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Term
| What is speed faster than the speed of sound called? |
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Definition
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Term
| What are several pitches played together? |
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Definition
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Term
| What is an unpleasant set of pitches called? |
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Definition
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Term
| What is a pleasant set of pitches called? |
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Definition
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Term
| Who believed that light is a stream of fast moving, unimaginably tiny particles with he called corpuscles? |
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Definition
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Term
| Newton's experiments showed that light also behaves like what? |
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Definition
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Term
| light is represented as a ray that travels in a straight path, and direction cold only by changed by placing an obstruction in the path |
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Definition
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Term
| Why was the ray model of light introduced? |
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Definition
| a way to study how light interacts with matter regardless of whether light is a particle or wave |
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Term
| What is the study of light called? |
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Definition
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