Archives of Ask A Scientist!
About "Ask A Scientist!"
On September 17th, 1998 the Ithaca Journal ran its first "Ask A Scientist!" article in which Professor Neil Ashcroft , who was then the director of CCMR, answered the question "What is Jupiter made of?" Since then, we have received over 1,000 questions from students and adults from all over the world. Select questions are answered weekly and published in the Ithaca Journal and on our web site. "Ask A Scientist!" reaches more than 21,000 Central New York residents through the Ithaca Journal and countless others around the world throught the "Ask a Scientist!" web site.
Across disciplines and across the state, from Nobel Prize winning scientist David Lee to notable science education advocate Bill Nye, researchers and scientists have been called on to respond to these questions. For more than seven years, kids - and a few adults - have been submitting their queries to find out the answer to life's everyday questions.
The adhesive, unlike the other plastics, is a liquid like honey and will flow slowly and stick. If the adhesive touches another material, it must choose if it wants to stay in contact with the material or if it would rather remain in contact with air. Most good adhesives prefer to adhere (or stick) to a surface such as skin. If so, an adhesive bond is formed and the bandage covers the wound. If not, it falls off so that the adhesive can touch air instead of skin.
Other types of plastics that stick are coatings, such as paints. They are sticky when wet, but once they dry out they become hard. The adhesive plastics used in bandages are always sticky and never dry out. But they do not always stick. One way to make skin so that adhesives prefer contact with air (and will not stick) is to get the skin wet. So remember, if you ever need to apply a bandage, clean the wound, but make sure the skin is dry before you put it on.
- How many types of rocks are there throughout the world?
- Can candle wax become a gas?
- My instructor told me that the wavelength of laser light is determined by the distance between the mirrors in the laser device. I say he is not correct, it is the nature of the lasing medium itself as the molecules that make it up emit characteristic wavelenghts when excited. Which of us is correct?
- How does the desalination of water work?
- What exactly is radiation and why is it harmful? What can it do to you? How is it made?
- How do magnets work?
- Recycled metal looks like the same color as non-recycled metal. When soda cans are recycled, what happened to the paint or dye that was on top of the aluminum?
- Why is carbon the building block of matter?
- Is it possible to determine the resonance frequency of an object that has a diameter in nanometers in size (such as a cell)?
- What is the lowest temperature possible?