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# Waves,Work and Power

Question | Answer |
---|---|

What's the definition of Wave? | Vibrations in a medium releasing energy. |

What's the definition of Medium? | solid,liquid or gas that can go through a wave. |

What's the definition of Transverse Wave? | Where particles move perpendicularly to the direction the wave travels. |

What's the definition of Crest? | The points where the wave is the highest. |

What's the definition of Trough? | The point where the wave is the lowest. |

What's the definition of longitudinal wave? | Where the particles move back and fourth in the same direction that the wave travels. |

What's the definition of Compression? | The Part of a wave that is close together. |

What's the definition of Rarefaction? | The part of a wave that is not close together. |

What's the definition of Mechanical waves? | Waves that require a medium. |

What's the definition of Electromagnetic waves? | Waves that don't require a medium. |

What's the definition of Amplitude? | A measure of how far particles in the medium move from their rest position. |

What's the definition of Wavelength? | The distance from any point on a wave to the net identical point on the same wave. |

What's the definition of Frequency? | The number of waves that pass a point in a given amount of time usually 1 sec. |

What's the definition of Hertz (Hz)? | The unit in which frequency is measured in. |

What's the definition of Wave Speed? | The speed that waves travel. |

What's the definition of Force? | A push or pull exerted on an object in order to change the motion of the object. |

What's the definition of Work? | The use of force to move an object some distance. |

What's the definition of Power? | Rate at which work was done. |

How do you calculate power? | work divided by time |

How do you calculate work? | Force times distance |

How do you calculate wavelength and wave speed? | distance divided by time and wavelength times frequency |

The speed of the wave was 2.5 cm/s and the wave travel 50 cm, find the time it took that wave to travel that far? | d=S x T 50cm=25cm/sec x T 50÷2.5=20 20=T 20 seconds |

If the wavelength of a wave was 10mm and the speed 70mm/s find its frequency | s=λ ⋅ f 70= 10 ⋅ f 70 ÷ 10=7=f 7 Hz |

The frequency of a wave was 80 Hz and the wavelength was 5 cm,find its speed. | s=λ ⋅ f s= 80 ⋅ 5 speed=400 400 secconds |

If we measure the wavelength of a transverse wave from crest to crest or trough to trough , how would we measure the wave length of a longitudinal wave? | Compression to Compression OR refaction to refaction |

When a wave carries more energy there is a ___________ amplitude | Higher |