Unlike water, which weighs about 8.4 pounds per gallon, gasoline is 25% lighter. Many people instinctively think that all liquids weigh the same as water, which is inaccurate. This misconception can ...

After you've finished adding fuel to the torch's tank, there are still a couple of steps before you can start using it again. First, turn the lighter back over so it's right-side-up, and let it ...