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What does the weight mean on a can of motor oil?
auto.howstuffworks.com/fuel-efficiency/fuel-consumption/question164.htm
Motor oil weight depends on viscosity and other factors. Learn how motor oil weight is determined in this article.
What is fertilizer and why do plants need it?
home.howstuffworks.com/question181.htm
What is fertilizer and why do plants need it? What do the three numbers on most bags of fertilizer mean?
Plastic Numbers: Breaking Down Recycling Codes
science.howstuffworks.com/environmental/green-tech/sustainable/question217.htm
There are seven different numbers you might see on a plastic container. And each number has its own meaning.
What do the UL marks on so many products mean?
electronics.howstuffworks.com/everyday-tech/question218.htm
A large number of electronic devices carry "UL" marks. You can find them on everything from Christmas lights to digital camcorders. What does this logo mean?
Why do some dump trucks have extra moveable axles?
auto.howstuffworks.com/question26.htm
I see many dump trucks with wheels on two rear axles on the ground and a third axle with elevated wheels that can be lowered. These seem to be used when the truck is full -- but why include what must be expensive hardware to raise and lower the wheels? Why not just keep them down at all times?
What causes things like fatal exception errors?
computer.howstuffworks.com/question288.htm
Even though there is nothing you can do with the cryptic error messages your computer gives you during a problem, it might be nice to at least know what they mean! Find out what the three most common ones error messages mean.
What do the big diamond-shaped signs with red yellow and blue diamonds mean?
people.howstuffworks.com/question327.htm
Many buildings in my area have a big red, yellow and blue diamond-shaped sign with numbers on it. Do you know what this sign means?
How does a rice cooker know when to turn off?
recipes.howstuffworks.com/tools-and-techniques/question35.htm
There are a number of appliances, like rice cookers, that "know" when they should turn off. Learn how this technology works to help your appliances running smoothly.
Why do tools have "Drop Forged" stamped on them? What is drop forging?
home.howstuffworks.com/question376.htm
I have a number of tools (things like wrenches and C-clamps) that have the words "Drop Forged" stamped on the handle. What does that mean?
How does the Social Security system work?
money.howstuffworks.com/question385.htm
How does the Social Security system (in the U.S.) work? When I pay money into the system, where does my money go and where is my account kept (does some bank have the money in my account)?