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Why does caffeine keep you awake?
health.howstuffworks.com/wellness/drugs-alcohol/caffeine-awake.htm
Caffeine effects include an increase in your heart rate and an increased level of alertness. Learn more about some of the different caffeine effects.
Inside a Power-Cube Transformer
science.howstuffworks.com/environmental/energy/inside-transformer.htm
A power-cube transformer is used for just about every electronic device, but what's on the inside? Take a look inside a power-cube transformer.
What Causes Seasons? Earth's Tilt and Orbit
science.howstuffworks.com/nature/climate-weather/atmospheric/question165.htm
What causes the seasons? Why are the seasons reversed in the Northern and Southern Hemispheres? And if the Earth moves in an elliptical orbit around the Sun, why don't we have two summers and two winters every year?
What does a V-chip do and how does it work?
electronics.howstuffworks.com/question167.htm
Do you know what the v-chip does in your TV? Learn how a v-chip detects TV ratings and gives parents the ability to control viewing of violent content.
How does hemp work?
science.howstuffworks.com/life/botany/question211.htm
How does hemp work? What do rope and "organic clothes" and drugs have to do with each other?
If all the money in the U.S. only totals $6 trillion how can the New York Stock Exchange have stocks valued at $15 trillion?
money.howstuffworks.com/question241.htm
In a previous Question of the Day, you state that all the money in the U.S. M3 money supply is $6 trillion. If there is only $6 trillion available, then how can the New York Stock Exchange say it is "home to some 2,800 companies valued at about $15 trillion in global market capitalization." How can the stock market be worth $15 trillion if there is only $6 trillion available?
What is the churning sound I hear from my hard drive whenever it is retrieving data?
computer.howstuffworks.com/question243.htm
What is the churning sound I hear from my hard drive whenever it is retrieving data?
What is an atomic clock and how does it work?
science.howstuffworks.com/question40.htm
Many ads for new clocks advertise their ability to automatically synchronize themselves with the atomic clock in Boulder, Colorado. This atomic clock is more precise because it uses the frequencies of atoms as its resonator.
What Is Leap Year? And Why Was 1900 a Non-leap Year?
science.howstuffworks.com/science-vs-myth/everyday-myths/question50.htm
February is an unusual month, especially when it comes to leap years. In this article, you can read about why we use leap years and how the year 2000 was a leap year and 1900 was not.