Agriculture
Where Have All the Bees Gone?
Chicken Eggs as Drug Factories
Flush-Free Fertilizer
Amphibians
Toads
Bullfrogs
Newts
Animals
A Meal Plan for Birds
Blotchy Face, Big-Time Wasp
Firefly Delight
Behavior
Pipefish power from mom
Bringing fish back up to size
Eating Troubles
Birds
Peafowl
Vultures
Woodpecker
Chemistry and Materials
Revving Up Green Machines
Cooking Up Superhard Diamonds
Hitting the redo button on evolution
Computers
A New Look at Saturn's rings
Small but WISE
The Shape of the Internet
Dinosaurs and Fossils
Tiny Pterodactyl
Dino Flesh from Fossil Bone
Ancient Critter Caught Shedding Its Skin
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
On the Trail of America's Next Top Scientists
Shrinking Glaciers
Rocking the House
Environment
Power of the Wind
To Catch a Dragonfly
Watching for Wildfires in Yellowstone
Finding the Past
Preserving Ancient Warrior Paint
A Long Trek to Asia
Your inner Neandertal
Fish
Tuna
Piranha
Bull Sharks
Food and Nutrition
Healing Honey
The Essence of Celery
Sponges' secret weapon
GSAT English Rules
Problems with Prepositions
Pronouns
Order of Adjectives
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
Tarrant High overcoming the odds
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
Results of GSAT are in schools this week
GSAT Scholarship
GSAT Mathematics
A Sweet Advance in Candy Packing
Detecting True Art
Monkeys Count
Human Body
Heavy Sleep
A New Touch
Spit Power
Invertebrates
Caterpillars
Mussels
Wasps
Mammals
Glider
Sea Lions
Pekingese
Parents
How children learn
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
Project Music
Electric Backpack
Thinner Air, Less Splatter
Plants
Underwater Jungles
Seeds of the Future
The algae invasion
Reptiles
Komodo Dragons
Alligators
Turtles
Space and Astronomy
Sounds of Titan
A Planet's Slim-Fast Plan
Holes in Martian moon mystery
Technology and Engineering
Smart Windows
Sugar Power for Cell Phones
Model Plane Flies the Atlantic
The Parts of Speech
What is a Verb?
What is a Noun
Adjectives and Adverbs
Transportation
Are Propellers Fin-ished?
Troubles with Hubble
Morphing a Wing to Save Fuel
Weather
A Change in Climate
Warmest Year on Record
Recipe for a Hurricane
Add your Article

Thinner Air, Less Splatter

If you could slow down time, you'd be amazed at the things you could see. In slow motion, for example, you could watch individual drops of rain landing in puddles and making mini-splats. Scientists have been able to observe this process by using cameras that take thousands of pictures every second. Such photos give them the ability to see what our eyes are too slow to catch. Pictures of splashing milk droplets, in particular, have been popular ever since the 1930s, when technology made it possible to capture them. A new experiment adds another twist to these frozen moments in time. Changing the air pressure around a droplet affects the kind of splash it makes. For the study, researchers from the University of Chicago used a sealed chamber that let them change the air pressure inside. At different air pressures, they allowed alcohol drops to fall onto glass slides. They filmed each trial at 47,000 video frames per second. Their results showed that drops hit with smaller splats or no splashing at all when the air pressure was lower than normal. When the scientists increased the air pressure, drops splattered more readily. The researchers also discovered that filling the chamber with lighter gases, such as helium, led to smaller splats compared to ones in the presence of heavier gases. To explain their results, the scientists suggest that, as a drop flattens when it comes in contact with a surface, it spreads out along its edges and pushes against a thin layer of the surrounding gas. The gas resists being trapped, which forces the film's edge upward. This interaction creates the splash. When air pressure is low or the gas is light, the gas can't resist as strongly, and the splat is weaker or never forms in the first place. The scientists were surprised by their discovery. "I don't think anyone ever thought poor little old air could do anything to the splash," says physicist Sidney R. Nagel, who led the Chicago team. Engineers are interested in the work, too. In industry and at home, splashing affects the quality of important processes, including ink-jet printing, engine combustion, and product washing. Finding ways to control the size of a splat could make such jobs a lot more efficient.E. Sohn

Thinner Air, Less Splatter
Thinner Air, Less Splatter








Designed and Powered by HBJamaica.com™