Triple point
Science

Triple point

In thermodynamics, the triple point of a substance is the temperature and pressure at which three phases (for example, gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium. For example, the triple point of mercury occurs at a temperature of -38.8344 °C and a pressure of 0.2 mPa.

In addition to the triple point between solid, liquid, and gas, there can be triple points involving more than one solid phase, for substances with multiple polymorphs. Helium-4 is a special case that presents a triple point involving two different fluid phases (see lambda point). In general, for a system with p possible phases, there are 

Triple Point formula

 

   

triple points.

The triple point of water is used to define the kelvin, the SI base unit of thermodynamic temperature.[2] The number given for the temperature of the triple point of water is an exact definition rather than a measured quantity. The triple points of several substances are used to define points in the ITS-90 international temperature scale, ranging from the triple point of hydrogen (13.8033 K) to the triple point of water (273.16 K).

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Three Sisters --- corn, beans, squash
Food - Nutrition

 

Three Sisters
Three Sisters

 

The ancient Native American technique of growing Corn, Beans, and Squash together in an arrangement called the Three Sisters is the ultimate in companion planting and helps increase harvests, naturally!

Corn acts as a support for climbing bean vines, the beans fix nitrogen in the soil for the high feeding requirements of corn and squash, and the squash provides mulch and root protection for the corn and beans! After cooperating beautifully in the garden, corn and beans form a complete protein when eaten together! How's that for a mutually beneficial relationship?

The Three Sisters are all easy to direct sow in the garden and are a great project for children, teaching them about the beauty of natural harmony while providing a fast-growing reward for their efforts.

Make the best possible use of your garden space this season, and try growing the Three Sisters! Just follow the easy steps listed below, fertilize well, plant other companions like herbs to assist with pest control, and you'll be harvesting your best crop in no time!
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Plants in threes
Nature

trillium

A search list from plants.usda.gov.

Results for Common Name = three

150 records returned.
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Lewis Carroll

Lewis Carrol
Lewis Carrol
 

"You are old," said the youth, "one would hardly suppose
That your eye was as steady as ever;
Yet you balanced an eel on the end of your nose -
What made you so awfully clever?"

"I have answered three questions, and that is enough,"
Said his father. "Don't give yourself airs!
Do you think I can listen all day to such stuff?
Be off, or I'll kick you down stairs!"

3's flash

Trivia comes from the Latin word Trivum; which was the foundation for learning that lead to the Quadrivium. It includes the foundations of grammar (the language), logic (to reason) and rhetoric (to persuade). It's the connectivity of everything that creates knowledge.

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Is three the magic number?
 

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