Recent content by Joy Wong

  1. J

    Pulse pass medium 1 to medium 2 Problem

    Could I ask how to calculate λ1 = 57.4cm?
  2. J

    What is the beat frequency for a cyclist ringing a bell towards a wall?

    Ok,thanks
  3. J

    What is the beat frequency for a cyclist ringing a bell towards a wall?

    Homework Statement A cyclist with a bell ringing with a frequency of 659.7 Hz drives towards a wall with a speed of 8.15 ms-1. Just before colliding with the wall the cyclist hears beats, due to the bell itself and the reflection of the sound from the wall. What is the frequency of beats...