click below
click below
Normal Size Small Size show me how
1 Ch - Phy Sc M 9A
Physics - Waves & Sounds (Apologia Physical Science M 9A)
Question | Answer |
---|---|
mechanical wave | a disturbance in matter that transfers energy through the matter |
medium | the matter through which a wave travels |
transverse wave | a wave in which the medium vibrates at right angles to the direction the wave travels |
trough | the lowest point on a wave |
crest | the highest point on a wave |
wavelength | the distance between the crests (or troughs) of a wave |
amplitude (A) | the height of the wave; the maximum displacement of the medium from its rest position |
longitudinal wave | a wave in which the vibration of the medium is parallel to the direction the wave travels |
compressions | the places where particles of the medium crowd close together |
rarefaction | the spaced areas of a wave or where the coils of a medium are pulled farther apart |
surface wave | a wave that travels along the surface of a medium; a combination of transverse and longitudinal waves |
Both transverse and longitudinal waves carry energy through a medium without _______________ ______________. | transferring matter |
Mechanical waves are formed when a source of energy causes a ____________________ to travel through a medium. | vibration |
The more energy a wave has, the _______________ its amplitude. | greater |
If wavelength is INCREASED, frequency is _____________________. | decreased |
Wavelength and frequency are _________________ proportional to one another. | inversely |
The more energy a wave has, the greater its __________________. | amplitude |
frequency | the number of complete cycles of waves in a given period of time |
hertz (Hz) | 1 cycle per second (1/s) |
periodic motion | any motion that repeats at regular time intervals |
period | the time it takes to complete one full cycle |
wavelength | the distance between a point on one cycle of a wave and the same point on the next cycle |
Wavelength and frequency are _____________________ proportional to one another. | inversely |
speed = | wavelength x frequency |
oscillate | to vibrate back and forth |
In TRANSVERSE waves, the medium vibrates ________________________ to the direction the wave travels. | perpendicular |
An example of a transverse wave is | shaking a rope up and down. |
In LONGITUDINAL waves, the medium vibrates ________________________ to the direction the wave travels. | parallel |
An example of a longitudinal wave is | the compressions and rarefactions of a Slinky. |
In surface waves, the medium vibrates both ________________________ and ___________________ to the direction the wave travels, so it has ____________________ __________________. | perpendicular parallel circular motion |
An example of surface waves are | deep water ocean waves. |