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How To Calculate Your Pregnancy Due Date
Once your pregnancy has been confirmed, what you most want to know is your due date. The average length of a pregnancy is 40 weeks, or 280 days, from the first day of the last normal menstrual period. Here's an example of how it works.
How Dieting Works
health.howstuffworks.com/wellness/diet-fitness/weight-loss/diet.htm
Dieting is a multibillion dollar industry in the United States, but it doesn't work for most people. The standard story is: Lose 20, gain 30. But there are healthy, effective ways to lose weight. Find out why most diets fail and what you can do to make yours work.
How Gear Ratios Work
science.howstuffworks.com/transport/engines-equipment/gear-ratio.htm
You see gears in just about anything that has spinning parts - car engines, transmissions, electric toothbrushes... Learn what these gears are doing and get to the bottom of the "gear ratio" concept!
How Fractals Work
science.howstuffworks.com/math-concepts/fractals.htm
Fractals have been around forever but were only defined in the last quarter of the 20th century. Think you can wrap your brain around how fractals work?
How to Calculate the Percent Error Formula
science.howstuffworks.com/math-concepts/percent-error-formula.htm
We take the mystery out of reporting the percent error correctly and show you how to use it in real life.
How the Census Works
people.howstuffworks.com/census.htm
The U.S. census is a huge project bent on counting every U.S. resident. Find out about the changes for the 2020 census with HowStuffWorks.
How Slot Machines Work
entertainment.howstuffworks.com/slot-machine.htm
Slot machines are a popular form of gambling. Learn about modern slot machines and old mechanical models and find out the odds of winning on slot machines.
How Car Computers Work
auto.howstuffworks.com/under-the-hood/trends-innovations/car-computer.htm
Cars seem to get more complicated with each passing year. Today's cars might have as many as 50 microprocessors on them. Essentially, you're driving around in a giant computer. Learn all about it.
1969 Dodge Super Bee Six Pack
musclecars.howstuffworks.com/classic-muscle-cars/1969-dodge-super-bee-six-pack.htm
The 1969 Dodge Super Bee Six Pack was a muscle car that got noticed. Find out why by looking at these photos and exclusive specifications.
1970 Plymouth Road Runner Superbird
musclecars.howstuffworks.com/classic-muscle-cars/1970-plymouth-road-runner-superbird.htm
The 1970 Plymouth Road Runner Superbird stood out in a fast crowd. Learn about this rare and wild muscle car, plus photos and specifications.