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# Energy Test

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

Wave | Vibrations in a medium |

Medium | the material through which a wave can travel |

Transverse wave | a wave which the object moves up and down as the wave passes |

Crest | the points where the wave is the highest |

Trough | the points where the wave is the lowest |

Longitudinal wave | a wave which the particles move back and forth in the same direction the waves travel |

Compression | when you compress the wave closer toghether |

Rarefaction | when you spread the wave apart |

Mechanical waves | waves that require a medium |

Electromagnetic waves | waves that can travel without a medium |

Amplitude | the measure of how far particles in the medium move from their rest position |

Wave length | the distance over which the shapes repeat |

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

Hertz | What frequency is measured in |

Wave speed | the speed that waves travel |

What is the equation for wave speed? | wave speed=wave length divided by wave period |

Force | a push or pull exerted on an object in order to change the motion of an object newtons |

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

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

What is the equation for work? | Work=force times distance |

Power | a strong force |

A 900N mountain climber scales a 100m cliff. How much work is done by the mountain climber? | 90,000 J |

Angela uses a force of 25N to lift her grocery bag while doing 50 J of work. How far did she lift the grocery bags? | 2m |

A machine does 40 J of work in 10 seconds. How much power is that? | 4 watts |

What is power measured in? | Watts |

A machine does 30 J of work in 10 seconds. How much power is that? | 3 watts |

Give an example of a medium. | Slinky, sound particles |

Mariah hears the orchestra play in a concert. What kind of wave would the sound travel through? | Longitudinal wave |

What kind of wave would your heart rate show? | Transverse wave |

What would be the medium in a sound wave? | Sound particles |

A wave with a frequency of 60 Hz travels through steel with a wavelength of 85.5 m. What is the speed of this wave? | 510 m/s |

I can edit your study stack! | - Mrs. Koch =) |