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Waves-Work-Power
| Question | Answer |
|---|---|
| Definition of Wave | A disturbance that transfers energy |
| Definition of Medium | A material through which a wave can travel through |
| Definition of Transverse Wave | Particles moving perpendicular to the direction the wave travels |
| Definition of Crest | The points where the wave is highest |
| Definition of Trough | The points where the waves are the lowest |
| Definition of Longitudinal Wave | Particles moving back and forth the same direction that the wave travels |
| Definition of Compression | A region in a longitudinal wave where the particles are closest together |
| Definition of Rarefaction | A region in a longitudinal wave where the particles are furthest apart |
| Definition of Mechanical Waves | Waves that require a medium |
| Definition of Electromagnetic Waves | Waves that can travel without a medium that are vibrations of electric and magnetic fields. |
| Definition of Amplitude | A measure of how far particles in the medium move from their rest position |
| Definition of Wavelength | The distance from any point on a wave to the next identical point on the same wave |
| Definition of Frequency | The number of waves that pass a point in a given amount of time |
| Definition of Hertz | What frequency is measured in (one hertz is equal to one wavelength per second) |
| Definition of Wave Speed | The speeds that waves travel |
| Definition of Force | A push or pull exerted on an object in order to change the motion of the object |
| Definition of Work | The use of force to move an object some distance |
| Definition of Power | The rate at which work is done |
| What is Force measured in? | Newtons |
| What is Work measured in? | Joules |
| What is Power measured in? | Watts |
| What is the formula to find Work? | Work= Force ・Distance |
| What is the formula to find Power? | Power= Work / Time |
| What is the formula to find Wave Speed? | Wave speed= wavelength/ wave period |
| If a girl has a force of 70N and a work of 140j, what is the distance? | 2 meters |
| If a dog has the work of 180j and walks up the steps in 5 seconds, how much power does it take the dog to walk up the steps? | 36 watts |
| If you have a wave length of 18 cm and a wave period of 3 seconds, what is the wave speed? | 6 cm/second |
| If a boy has the force of 212N and he travels 20 meters across a football field, how much work is the boy doing? | 10.6j |
| If a horse has a power of 78 watts and it take the horse 20 seconds to run the track, what is the horses work? | 3.9j |
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