Category : Hobbies & Science : Society & Culture & Entertainment

How Light Bulbs Work

Hobbies & Science
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HistoryThe light bulb, perfected for market as the nineteenth century came to a close, changed the way people lived and worked. It replaced the dirty, labor-intensive oil lamps and explosive gaslights that had been used to illuminate dark places with a clean, safe system that made it...

Creating a Stress Ball

Hobbies & Science
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Stress balls are soft balls that can be squeezed to relieve tension or stress. It is a simple craft that can be easily made. Since the craft requires such little time and materials, you can make multiple stress balls for friends or co-workers. They can also be used for party favors or as small gifts

Exponent Activities

Hobbies & Science
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Exponents are a mathematical representation of how many times a base number should be multiplied by itself. For example, 3^3, or "three raised to the exponent of three," equals 3 * 3 * 3. Raising any number by the exponent of 1 equals the base number. For example, 3^1 = 3. Raising any number by the