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# Kaitlyn Gardner

### My Study Stack

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

What is a wave? | A wave is vibration of a medium. |

What is medium? | Medium is the material through which a wave can travel. |

What is a transverse wave? | A transverse wave is a wave that moves perpendicularly to the direction the wave travels. |

What is the crest? | The crest is the highest points in a wave. |

What is the trough? | The trough is the lowest points in a wave. |

What is a longitudinal wave? | A longitudinal wave is a wave vibrating in the direction of the motion of the wave. |

What is compression? | Compression is when a wave tightens or compresses. |

What is rarefaction? | Rarefaction is when a wave spreads out. |

What are mechanical waves? | Mechanical waves are waves the require a medium. |

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

What is amplitude? | Amplitude is how far the partials in the medium move from it's rest position. |

What is a wavelength? | A wavelength is any point on a way to the next identical point on the same wave. |

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

What is hertz? (Hz) | Hertz is what the frequency is measured in. |

What is wave speed? | Wave speed is the speed that waves travel at. |

What is the equation for wave speed? | Hertz times wavelength. |

What is force? What is the measurement unit for force? | Force is a push or pull applied on an object in order to change the motion of the abject. Force = Newtons |

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

What is the equation for work? What is the measurement unit for work? | Force times distance = work (joules) |

What is power? | Power is the amount of work you have done divided by how long it took you to do it. |

What is the equation for power? What is the measurement unit for power? | Work divided by distance = power (watts) |

If 200 Joules of work are needed to move a bike a distance of 10 meters, what is the weight of the bike? | 200/10 or 200 divided by 10 = 20 Newtons This bike weighs 20 Newtons. |

If 50 Joules of work were needed to move a 2 Newton book, how far was the book moved? | 50/2 or 50 divided by 2 = 25 meters The book was moved 25 meters. |

How much time is needed to produce 800 Joules of work if 20 watts of power is used? | 800/20 or 800 divided by 20 = 40 seconds |

If 50 W of power is produced in 10 seconds, how much work is done? | 50/10 or 50 divided by 10 = 5 Joules |

How does work relate to force? | Force is in the equation for work. |

When is work used? | Work is used when you want to find how much power you have done. |

How does time relate to work? | Time relates to work because work divided by time will equal power. |

How are the crest and trough similar? | Both the crest and trough are points of a wave measuring how high or low the wave goes. |

Can a wave travel through a medium that is a liquid? | Yes, the wave might go slower than going though a gas but it can still go through a liquid. |

Does a electromagnetic wave require a medium? | No, electromagnetic waves travel with out a medium. Examples of electromagnetic waves are ultraviolet waves, radio waves, and many more types of waves. |

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