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How does a hydraulic ram pump work?
science.howstuffworks.com/transport/engines-equipment/question318.htm
When I was a kid, my Aunt had constantly flowing water from a natural spring down the hill. She said the water was pumped uphill using a hydraulic ram. This device ran constantly and didn't need any electricity! What is a hydraulic ram and how does it work?
Where does America's gas come from?
science.howstuffworks.com/environmental/energy/america-gas-source.htm
America's gas and its sources are explained in this article. Learn about America's gas sources.
Why does beer form a head but soda doesn't?
science.howstuffworks.com/innovation/edible-innovations/beer-form-head-not-soda.htm
A quickly poured beer or soda can create a layer of foam -- also known as a "head" -- toward the top of the glass. But while a soda head rapidly disappears, a beer head lingers even after you've begun to drink the beer. How can this be possible?
Does a hush really pass over a crowded room 20 minutes after the hour?
science.howstuffworks.com/science-vs-myth/everyday-myths/hush-crowded-room.htm
You're talking with a group of people when, with no apparent warning, everyone stops talking. Is it just an awkward silence or a pregnant pause? Or is this silence something more?
The Mpemba Effect: Does Hot Water Really Freeze Faster Than Cold Water?
science.howstuffworks.com/dictionary/physics-terms/mpemba-effect.htm
Under the right conditions, hot water can somehow freeze faster than cold water. It's called the Mpemba effect. We'll explain how it happens.
How does a candle work?
home.howstuffworks.com/question267.htm
How do candles work? What keeps the wick burning, seemingly forever, when the same twine would completely burn up in a matter of minutes if it weren't engulfed in wax? Why won't the wax burn without a wick?
How does your body digest a cigarette?
health.howstuffworks.com/wellness/smoking-cessation/digest-a-cigarette.htm
Can you body really digest a cigarette? Not really -- those chemicals just aren't useful for its functions. Find out how your body digests a cigarette.
Why Does Salt Melt Ice on the Roads in Winter?
science.howstuffworks.com/nature/climate-weather/atmospheric/road-salt.htm
Road salt is used to melt ice in the winter. Learn about road salt in this article from HowStuffWorks.
What does 'dry down' mean?
lifestyle.howstuffworks.com/style/body-scents-fragrances/dry-down.htm
The dry down period is part of the perfume process. Find out what dry down is and how it affects the way we smell.
How does the toilet in a commercial airliner work?
science.howstuffworks.com/transport/flight/modern/question314.htm
When flushing the toilet in a passenger airplane, I'm amazed by the huge noise it makes -- like a powerful vacuum cleaner. Can you explain what makes this noise?