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Cullen Hassel SS
Cullen Hassel study stack
Question | Answer |
---|---|
Wave | A disturbance that transfers energy |
Medium | Material-solid, liquid, gas-through which a wave can travel |
Transverse wave | Particles move perpendicularly to the direction the wave travels |
Crest | The highest point in a wave |
Trough | The lowest point in a wave |
Longitudinal wave | Particles move back and forth in the same direction the wave travels |
Compression | When the wavelengths are close together |
Rarefaction | When the wavelengths are far apart |
Mechanical wave | A wave that requires a medium |
Electromagnetic wave | Not disturbances in a physical medium |
Amplitude | Measure of how far particles in the medium move from their rest position |
Wavelength | Distance from any point on a wave to the next identical point on the same wave |
Frequency | Number of waves that pass a point in a given amount of time |
Hertz | The measure of frequency |
Wave speed | The speed that waves travel |
Force | Push or pull exerted on an object measured in Newtons |
Work | Use of force to move an object some distance W=F multiplied by D measured in Joules |
Power | Measure of how much energy a force transfers when it acts on a moving object |
A 20N dog climbs one flight of stairs at least once everyday to get to his bed. This takes him 5 seconds. Each step is 2 meters high. how much power does the dog generate | 8 Watts |
If a seventh grader runs down the hallway which is 8 meters long and his force is 35N what is his work | 280 Joules |
Elephants use sound with very low frequency, 5 cycles per second. If the speed of sound is 20 degrees C is 340m/s how long is the wavelength | WL=WS/F 340/5=68cm |
What is the expression for power | P=W/T |
Unit of measurement for energy | Joules |
What is force measured in | Newtons |
The speed of the wave was 2.5cm/s and the wave traveled 50cm find the time it took the wave to travel that far | S=D/T 50/5 multiplied by 5=20p T=D/T |
If the frequency of a wave was 80Hz and the wavelength was 5cm what was its speed | S=WL multiplied by F 80 multiplied by 5=400cm/s |