This design seeks to minimise the surface area exposed to the water, but always maximising the volume, which is what really displaces the mass of water and provides buoyancy. Geometrically, the ideal would be a sphere (maximum volume with the smallest surface area), but a sphere is not prac...
We need to calculate the work done in increasing the diameter of a soap bubble. A soap bubble has two surfaces (inside and outside), so we need to consider the change in surface area due to the change in diameter. Step 2: Convert diameters to radiusThe initial diameter of the bubble ...
A pair of sunglasses seems so simple -- it's two pieces of tinted glass or plastic in some sort of plastic or metal frame. How much more straightforward can something get? It turns out that there are many different things you can do with two pieces of glass, and these things can have...
Solar sail technology will eventually play a key role in long-distance NASA missions. But just how far will these solar sails be able to take us and how fast will they get us there? As we found out in the last section, solar sails would not initially be driven by the amount of force...
1.3.5 Thermodynamic Work of Adhesion The thermodynamic work of adhesion, that is the work required to separate unit area of two phases in contact, is related to surface free energies by the Dupré equation. It is the minimum work needed to separate the phases, and energies needed to break ...
Earth itself can act as a fourth "satellite" or sphere; only one of the two possible points will actually be on the surface of the planet, so you can eliminate the one in space. Receivers generally look to four or more satellites, however, to improve accuracy and provide precise altitude...
Inside a cylinder lock, there is a sort of puzzle, which only the correct key can solve. The main variation in lock designs is the nature of this puzzle. One of the most common puzzles is the pin-and-tumbler design. Check out the next page to learn more about this lock design. Pin...
So why aren’t we all jumping out of airplanes then?Well,even 200,000 years ago,too much risk-taking could get one killed.A few daring survived,though,along with a few stay-in-the-cave types.As a result,humans developed a range of character types that still exists today.So mayb...
out of judgement and lets me focus on what is, and not what should or could be.” I just imagine that everyone is trying to let their light shine and I just need to find that light. Whether it’s a smile, or nod of a stranger or holding the door open or winking at a toddler....
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