CaYPT 2019

Final Physics Match

The Final Physics Match was held in the afternoon of Day 2. The results can be found below.

Total Sum of Points (March 23rd, 2019)

According to the Rules and Regulations of the CaYPT. The Teams with the highest Total Sum of Points (TSP) compete in the Final Physics Match.

Midterm Rankings (March 16th, 2019)

Below are the team rankings after Day 1. Unfortunately, the midterm rankings presented on Saturday, March 16th were not accurate; we apologize for any confusion this may have caused. Congratulations to UTS 1, Pentaquarks, and Phun for holding the top three spots after Day 1!

If you have any questions about these rankings, please email us at 

Event Details

Location: University of Toronto (St. George Campus), McLennan Physical Laboratories, 60 St. George St.

Dates: Saturday, March 16th, 2019 (Day 1) and Saturday, March 23rd, 2019 (Day 2)

Transportation: All teams must arrange their own transportation and arrive on time for the competition (unless teleconferencing).

Meals: If your team has ordered any meals and has not already paid for them, please do so in-cash at the event.

Please see the CaYPT 2019 Schedule for the plan of the day. In addition, familiarize yourself with the map of the location as well as the scoresheets that will be used in the judging process.

The following are the selected problems for CaYPT 2019. It is suggested that your team attempt all of these problems as soon as possible.

CaYPT 2019 Problems

  1. A. Undertone Sound
    Allow a tuning fork or another simple oscillator to vibrate against a sheet of paper with a weak contact between them. The frequency of the resulting sound can have a lower frequency than the tuning fork’s fundamental frequency. Investigate this phenomenon.
  2. B. Funnel and Ball
    A light ball (e.g. ping-pong ball) can be picked up with a funnel by blowing air through it. Explain the phenomenon and investigate the relevant parameters.
  3. C. Filling Up a Bottle
    When a vertical water jet enters a bottle, sound may be produced, and, as the bottle is filled up, the properties of the sound may change. Investigate how relevant parameters of the system such as speed and dimensions of the jet, size and shape of the bottle or water temperature affect the sound.
  4. D. Hurricane Balls
    Two steel balls that are joined together can be spun at incredibly high frequency by first spinning them by hand and then blowing on them through a tube, e.g. a drinking straw. Explain and investigate this phenomenon.
  5. E. Loud Voices
    A simple cone-shaped or horn-shaped object can be used to optimise the transfer of the human voice to a remote listener. Investigate how the resulting acoustic output depends on relevant parameters such as the shape, size, and material of the cone.
  6. F. Suspended Water Wheel
    Carefully place a light object, such as a Styrofoam disk, near the edge of a water jet aiming upwards. Under certain conditions, the object will start to spin while being suspended. Investigate this phenomenon and its stability to external perturbations.
  7. G. Looping Pendulum
    Connect two loads, one heavy and one light, with a string over a horizontal rod and lift up the heavy load by pulling down the light one. Release the light load and it will sweep around the rod, keeping the heavy load from falling to the ground. Investigate this phenomenon.
  8. H. Newton’s Cradle
    The oscillations of a Newton’s cradle will gradually decay until the spheres come to rest. Investigate how the rate of decay of a Newton’s cradle depends on relevant parameters such as the number, material, and alignment of the spheres.
  9. I. Sinking Bubbles
    When a container of liquid (e.g. water) oscillates vertically, it is possible that bubbles in the liquid move downwards instead of rising. Investigate this phenomenon.
  10. J. Popsicle Chain Reaction
    Wooden Popsicle sticks can be joined together by slightly bending each of them so that they interlock in a so-called “cobra weave” chain. When such a chain has one of its ends released, the sticks rapidly dislodge, and a wave front travels along the chain. Investigate the phenomenon.

Day 1 Problems: C, E, G, I, J

Day 2 Problems: A, B, D, F, H

Student Resources

Check out our YouTube channel and Facebook page!

Official IYPT Reference Kit 2019

IYPT Reference Kit 2019

Selected CaYPT Problems 


Registration for CaYPT 2019 is now closed.