गैर-न्यूटोनियन तरल: ऊब्लेक

कॉर्नस्टार्च और पानी से एक कतरनी-गाढ़ा द्रव बनाना

Classroom Demonstrations Beginner (Middle School) 20 मिनट ~$3.00

उद्देश्य

एक गैर-न्यूटोनियन तरल पदार्थ बनाएं और अन्वेषण करें जो लगाए गए बल के आधार पर ठोस और तरल दोनों की तरह व्यवहार करता है।

पृष्ठभूमि

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.'

सुरक्षा चेतावनियाँ

  • 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

सामग्री

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

उपकरण

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

प्रक्रिया

1

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

2 मिनट
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 मिनट
3

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

3 मिनट
4

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

3 मिनट
5

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

3 मिनट
6

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

4 मिनट Protect the speaker with plastic wrap

अपेक्षित परिणाम

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.

सफाई

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

विवरण

श्रेणी
Classroom Demonstrations
कठिनाई
Beginner (Middle School)
अवधि
20 मिनट
अनुमानित लागत
$3.00
चरण
6
सामग्री
3

अधिक प्रयोग

आयोडीन घड़ी अभिक्रिया 45 min गायब होता बीकर (अपवर्तनांक मिलान) 15 min घनत्व स्तंभ इंद्रधनुष 30 min तात्कालिक ठंड: अतिशीतित जल 120 min थर्माइट अभिक्रिया 30 min दोलनशील ब्रिग्स-राउशर अभिक्रिया 40 min ल्यूमिनॉल के साथ केमिल्यूमिनेसेंस 30 min सूखी बर्फ में मैग्नीशियम जलाना 25 min सोडियम और पानी की अभिक्रिया 25 min हाथी टूथपेस्ट 20 min

Frequently Asked Questions

What is the objective of गैर-न्यूटोनियन तरल: ऊब्लेक?
एक गैर-न्यूटोनियन तरल पदार्थ बनाएं और अन्वेषण करें जो लगाए गए बल के आधार पर ठोस और तरल दोनों की तरह व्यवहार करता है।
How difficult is गैर-न्यूटोनियन तरल: ऊब्लेक?
This experiment is rated as Beginner (Middle School). It takes approximately 20 minutes to complete.
What safety precautions are needed for गैर-न्यूटोनियन तरल: ऊब्लेक?
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 गैर-न्यूटोनियन तरल: ऊब्लेक?
The main materials required are: Cornstarch, Water, Food coloring.
What results should I expect from गैर-न्यूटोनियन तरल: ऊब्लेक?
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.