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# Work-Power-Waves

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

What is caused by vibrations of a medium? | Waves |

What is a medium? | Material through which a wave can travel. |

What do you call it when particles move perpendicularly to the direction a wave travels? | Transverse wave |

What is crest? | The point where the wave is at it's highest. |

What is it called where the point in a wave is at it's lowest? | Trough |

What is a longitudinal wave? | A wave where particles move back and forth in the same direction the wave travels. |

What is it called when the waves are close together? | Compression |

What is rarefaction? | When the waves are spread out. |

What are the kind of waves that require a medium? | Mechanical waves |

What are electromagnetic waves? | Waves that can travel without a medium. |

What measures how far particles in the medium move from rest position? | Amplitude |

What is the wavelength? | Distance from one point on a wave to the next identical point on the same wave. |

What is the number of waves that pass a point in a given amount of time? | Frequency |

What is hertz? | Frequency measurement equal to one wavelength per second. |

What is the speed that the wave travels? | Wave speed |

What is force? | A push or pull exerted on an object in order to change the motion of the object. |

What is the use of force to move an object some distance? | Work |

What is power? | The amount of work used in a gem. |

What is the unit of measure for force? | Newtons |

What is the unit of measure for work? | Joules |

What is the unit of measure for power? | Watts |

If a group of friends can apply a force of 500 newtons to move a couch 30 meters, what amount of work will they have accomplished? | 15,000 joules |

How much work is done when holding a 20 N pumpkin, waiting in line for 15 minutes? | No work |

If one person can apply a force of 125 newtons to move an end table 9 meters, what amount of work will the person do? | 1,125 joules |

A person getting on an escalator weighing 174 N goes up 6 meters and the escalator lifts the person in 25 seconds, how much power was used? | 41.76 watts |

If a pulley lifts a 500 N crate 30 meters in 75 seconds, how much power was used? | 200 watts |

Would the wavelength be greater or smaller if the waves were more compressed? | Smaller |

Most waves need a medium to travel through, but some don't. What are those two wave categories? | Mechanical and electromagnetic |

Sound and__________are a couple of examples of energy that can travel through waves. | Light |

What is done when an object moves through a distance because of a force acting upon an object? | Work |

If you're holding a 9 N sack of tomatoes and standing in line at the store for 6 minutes, are you able to calculate the work? | No |

True or false... you need to know the work and the distance to calculate power. | False(Only the work and the time.) |

Created by:
C311493