Daily Archives: May 5, 2014


I’ll be finished in a jiffy! What does that mean? What is a jiffy anyway? A jiffy is a measure of time. Sometime in the 18th Century, a jiffy was slang for ‘lightning’. In the 20th Century, American chemist, Gilbert Lewis proposed the jiffy should be the time it takes […]

What Is a Jiffy?



Vinegar and Baking Soda Volcano 3
There is more than one way to make a chemical volcano. Actually, there are several methods. Here are some of the best, from the tried-and-true baking soda and vinegar volcano to the most exotic dry ice volcano. Make the Volcano Cone You can use a bottle or can or really […]

5 Ways To Make a Volcano



Current solar cell technology uses a perovskite crystalline form containing lead, methylammonium (CH3HN3), and a halogen as the light-absorbing material. Organo-lead halide crystals are responsible for the recent increase in solar cell efficiency gains. Today’s cells work around the 35% efficiency point. The only problem is all the lead found in […]

Getting The Lead Out Of Solar Cells


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STP is the abbreviation for Standard Temperature and Pressure. The standard temperature is 273 K (0° Celsius) and the standard pressure is 1 atm pressure. If you perform calculations, it’s useful to know that one mole of gas occupies 22.4 L of volume (molar volume) at STP. When Is STP Used? You’ll […]

What Does STP Stand For?