Newton-Dışı Akışkan: Oobleck

Mısır nişastası ve suyla kayma-incelen akışkan oluşturma

Classroom Demonstrations Beginner (Middle School) 20 dak ~$3,00

Hedef

Uygulanan kuvvete bağlı olarak hem katı hem de sıvı gibi davranan Newton-dışı bir akışkan oluşturmak ve incelemek.

Arka Plan

Oobleck is a suspension of cornstarch in water that exhibits shear-thickening (dilatant) behavior. Under slow, gentle force, it flows like a liquid. Under sudden, strong force, the starch particles jam together and it behaves like a solid. This non-Newtonian behavior occurs because the starch particles are suspended at a critical concentration where they can rearrange under slow stress but lock together under rapid stress. The name comes from the Dr. Seuss book 'Bartholomew and the Oobleck.'

Güvenlik Uyarıları

  • Cornstarch is slippery when wet — clean up spills immediately
  • Do not pour oobleck down the drain — it will clog pipes
  • Non-toxic but not for consumption

Malzemeler

  • Cornstarch (400 g)
    About 2 cups
  • Water (250 mL)
    About 1 cup
  • Food coloring (5 drops)
    Optional

Ekipman

Large mixing bowl Spoon Plastic sheet or tray (to contain mess) Speaker with subwoofer (optional, for vibration demo)

Prosedür

1

Place the mixing bowl on the plastic sheet. Add the cornstarch to the bowl.

2 dak
2

Slowly add water while mixing with your hands. The ideal ratio is about 1.5–2 parts cornstarch to 1 part water. Add water gradually until the mixture is the consistency of thick honey.

5 dak
3

Test 1 (Slow force): Gently dip your hand in and slowly pull it out. The oobleck flows like a liquid.

3 dak
4

Test 2 (Fast force): Punch the surface hard. Your fist bounces off as if hitting a solid.

3 dak
5

Test 3 (Shaping): Squeeze a handful quickly into a ball. When you stop squeezing, it melts back into liquid.

3 dak
6

Optional: Place the bowl on a speaker playing low-frequency bass. The oobleck forms standing wave patterns and finger-like protrusions.

4 dak Protect the speaker with plastic wrap

Beklenen Sonuçlar

The oobleck flows under gentle handling but solidifies under impact. It can be rolled into a ball that melts in your palm. On a vibrating speaker, it forms dramatic standing wave patterns.

Temizlik

Let oobleck dry and scrape off surfaces. Do NOT wash down drains. Dispose of dried oobleck in trash. Wipe surfaces with damp cloth.

Ayrıntılar

Kategori
Classroom Demonstrations
Zorluk
Beginner (Middle School)
Süre
20 dak
Tahmini Maliyet
$3,00
Adımlar
6
Malzemeler
3

Daha Fazla Deney

Anlık Donma: Aşırı Soğutulmuş Su 120 min Fil Diş Macunu 20 min İyot Saati Tepkimesi 45 min Kaybolan Beher (Kırılma İndisi Eşleşmesi) 15 min Kuru Buzda Magnezyum Yanması 25 min Luminolle Kemilüminesans 30 min Salınan Briggs-Rauscher Tepkimesi 40 min Sodyum ve Su Tepkimesi 25 min Termit Tepkimesi 30 min Yoğunluk Sütunu Gökkuşağı 30 min

Frequently Asked Questions

What is the objective of Newton-Dışı Akışkan: Oobleck?
Uygulanan kuvvete bağlı olarak hem katı hem de sıvı gibi davranan Newton-dışı bir akışkan oluşturmak ve incelemek.
How difficult is Newton-Dışı Akışkan: Oobleck?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for Newton-Dışı Akışkan: Oobleck?
Key safety precautions include: Cornstarch is slippery when wet — clean up spills immediately; Do not pour oobleck down the drain — it will clog pipes; Non-toxic but not for consumption.
What materials are needed for Newton-Dışı Akışkan: Oobleck?
The main materials required are: Cornstarch, Water, Food coloring.
What results should I expect from Newton-Dışı Akışkan: Oobleck?
The oobleck flows under gentle handling but solidifies under impact. It can be rolled into a ball that melts in your palm. On a vibrating speaker, it forms dramatic standing wave patterns.