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I need a complete list all the doppler effect equations for a beginner physics class. Here is a sample questions so you know the level

Question: Two trains on separate tracks move toward one another. Train #1 has a speed of 130 km/hr and train #2 a speed of 90km/hr. Train 2 blows its horn, emitting a frequency of 500 Hz. What frequency is heard by the engineer on train #1?

If you also want to answer/explain the question given that would be helpful.

Mostly though I need a complete list of equations for this level of doppler effect problems. Thanks!

  • Physics -

    In your question, you have a moving source, and a moving observer (receiver). See this link, and the formula in the "general" section.

  • Physics -

    Consider an antenna transmitting at 900 MHz. The receiver is traveling at a speed of 40 km/h. Calculate its Doppler shift.

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