This activity brought to you in partnership with Science Buddies. If you do not have either one available, light the Sterno with a match or lighter and use this flame. Have everyone put on eye protection. New drive for tiny vessels February 14, Try this activity and see for yourself! Step 2: With the tip of a toothpick, carefully spread a thin layer of petroleum jelly just around the hole on both sides of the foil. Miniaturized robots can be propelled through biological fluids by an enzymatic reaction or ultrasound. Click to Buy at Flipkart.
(a) The water droplet slid on the coated glass slide contaminated by oil and (b) rolled on the coated glass slide immersed in oil. (c) Schematic of a water droplet.
Does the drop of water roll or slide across the paper? you will have a puzzle glass of water and note how the surface rises well above the rim of the glass.
We use a syringe to add a drop of water to each pair of slides before class, Glass slides can be purchased from scientific supply companies.
This is great for us, because we can simply: Place the iPad on a flat surface Immerse the cotton swab in the cup of water Squeeze the cotton swab head on top of the iPad camera until a drop of water falls on top of the camera This may require several tries, since you want to get: The smallest possible drop The drop centered on top of the camera lens The result would look similar to the images below: Once you have placed the drop, turn on the camera app and select to use the front camera.
For some liquids and surfaces, however, there is a significant deviation, for example in the case of water on silicon. Mechanochemistry can be used to produce corundum nanoparticles October 30, The water drop used here was rather large about 5mm in diameterand therefore produces a magnification of just about 20X.
The magnifying power of a lens is inversely proportional to the radius of curvature of its surface. Post to Cancel.
Dancing Droplets Scientific American
In this experiment we shall use a drop of water to make two thin slides stick to each The adhesive force acting between the glass and water is responsible for. Therefore, the smaller the radius of the water drop, the higher its optical a plant, dissolving it with water and placing it on a glass slide: Life is.
Unlike solids, however, there is a transitional range between static friction and sliding friction in which the friction decreases continuously.
The optics of the water drop are quite good for macro observations. Time to hunt for household objects to take a closer look at them… Here is a pencil: and the resulting image taken with the iPad camera: The water drop used here was rather large about 5mm in diameterand therefore produces a magnification of just about 20X.
A drop of Water Makes Slides Stick Together
They were also able to shed light on the question of whether drops roll or glide over a surface. Let the glass cool for approximately 10 minutes.
They should all be approximately the same size.
(The side. With an eyedropper, squeeze a drop of clean distilled water into the pinhole. Ask to borrow a few prepared slides from your science or biology teacher.
The reason for this chasing behavior is the difference in surface tension of the two droplets. Nuclear magnetic resonance scanner for individual proteins July 05, Open in new window.
Video: Water drop on glass slide Top 10 BIGGEST DROP Waterslides In The WORLD!
But they did find some clues to the answer by mixing tiny particles into the liquid, illuminating a drop and filming the movement of the drop and the particles inside it. Frictional forces cause the glass capillaries to bend.