Dancing Polymer

The video explores the effects of sound waves on non-Newtonian liquids, specifically Oobleck, a mixture of corn flour and water. By using a speaker and a signal generator, the video demonstrates how sound waves can make Oobleck behave like a solid, causing it to 'dance.' The mechanism involves pressure waves jarring the molecules together, temporarily solidifying the liquid. The video also highlights practical applications of sound waves, such as ultrasonic dental cleaning.

What is the main purpose of the experiment described in the video?

• To see if sound waves can make a non-Newtonian liquid behave like a solid.

• To measure the density of corn flour.

• To test the color change in liquids.

• To create a new type of speaker.

What is the name of the non-Newtonian liquid created in the experiment?

• Custard

• Gelatin

• Oobleck

• Slime

How does the speaker affect the Oobleck in the experiment?

• It makes the Oobleck change color.

• It heats the Oobleck.

• It causes the Oobleck to emit light.

• It makes the Oobleck dance by turning it into a solid.

What happens to the Oobleck when the frequency of the sound waves is reduced?

• It evaporates.

• It becomes more solid.

• It returns to its liquid state.

• It changes color.

What is the role of the signal generator in the experiment?

• To heat the Oobleck.

• To measure the weight of the Oobleck.

• To produce sound waves of varying frequencies.

• To add color to the Oobleck.

What is one surprising use of sound waves mentioned in the video?

• Ultrasonic dental cleaning.

• Charging batteries.

• Cooking food.

• Painting walls.

How do sound waves help in ultrasonic dental cleaning?

• By breaking up tartar and plaque.

• By whitening the teeth.

• By strengthening the gums.

• By polishing the teeth.