Monthly Archives: July 2010

How Laptop Power Supplies Work

Power supplies exist to convert the AC voltage supplied by power lines into DC voltage necessary to power a device such as a cell phone charger, a laptop, or a television. The power supply needs to lower the AC voltage … Continue reading

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A Doll’s House Outline

Thesis: Through the theme of Alienation in A Dolls House, Henrik Ibsen demonstrates that family roles, relationships, and societal expectations are a determining factor in alienation. Topic Sentence #1: Using family roles and relationships, Henrik Ibsen proves his theme of … Continue reading

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HP Mini review

I’ve had the Hp Mini 110 for about two weeks, and the conclusions are not very amusing. The screen size is OK, but most would agree that it for sure would look better with a glossy screen. At the start … Continue reading

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Bullet Penetration in Water

I have often wondered how far a bullet can penetrate water, since water is incompressible. In engineering, the density of water is often taken as constant. The theoretical analysis of bullet penetration in water is very difficult, so to get … Continue reading

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How baking Soda works

Baking soda, or Sodium Bicarbonate, NaHCO3, is used in cooking to release carbon dioxide, and help dough rise, or in the refrigerator to remove odors. Chemistry labs have baking soda in plentiful supply to neutralize both acids and bases, since … Continue reading

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How glow sticks work

Glow sticks work with through a chemical reaction that creates chemoluminescence. A glass capsule contains the solution, while the plastic casing contains the inner fluid. After bending the glow stick, the glass capsule breaks and the two solutions mix. Chemoluminescence … Continue reading

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