Trivia

Hard

Tapping On A Ketchup Bottle With A Knife To Extract The Ketchup Works Because Of?

Shearing Forces
Vibrations
Glass Harmonics
Phase Changes

Answer: Shearing Forces

Tomato ketchup isn’t just a delicious and widely used condiment, it’s a veritable science experiment in a bottle. In order to create a topping that can be applied to food without running all over the place, various thickening agents are added to the ketchup, including a tiny bit of xanthan gum. The addition of the xanthan gum gives the ketchup a really novel and curious property: it acts as a pseudoplatic with a shear thinning property. In other words, when it is at rest it is resistant to moving, but when the right amount of shearing force is applied, it changes the viscosity of the ketchup and it suddenly moves very quickly.

In fact, this is exactly why Heinz Ketchup bottles have a small circle with a 57 inside it located on the neck of the bottle. It’s not just a branding trick, that logo was placed in the glass bottle mold at the optimum place to tap the bottle with the back of a knife or other piece of silverware to apply the most efficient shearing force to the ketchup and trigger movement. After the ketchup flows out of the bottle and is no longer exposed to the shearing force, it thickens again to its original viscosity.

Trivia

Hard

The Distinct Style Of Artwork Used In Batman: The Animated Series Is Known As?

Trivia

Very Hard

Which Film Director Is Directly Responsible for the Rise of War-Theme FPS Games?

Trivia

Easy

Some People Avoid Which Of These Herbs Because They Report It Tastes Like Soap?

Trivia

Hard

The Ten Commandments Of The Golden Age Of Detective Fiction Were Intended To Prevent?

Trivia

Hard

Which Of These Fruits Was A Symbol Of Hospitality In Colonial America?

Trivia

Hard

A Popular African-Derived Rhythm Used In Rock and Pop Music Is Called The?

Trivia

Hard

According To The USDA, A Sandwich Is Defined By The Presence Of?

Trivia

Easy

What Was The First Medical X-Ray Of?

Trivia

Very Hard

Horror Director George A. Romero Originally Made Films For Whom?