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Paper is made of many, many tiny fibers. When you wet a piece of paper, those fibers absorb water and swell up. As they dry, the relaxed fibers don't go back to exactly where they started. Some will have shifted or "untangled", moving out of the plane of the original paper. So yes, the paper actually does become slightly bigger because the fibers have ...


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Test data shows that pressure on ground is calculated by dividing the weight of car divided by 4 then divided by patch area which will always be much less that the interior tire pressure. Test data shows that when the load is doubled the patch area only increases by 25%. e.g. under a 1000 pound load on tire the patch area is 100 sq.in while for a 2000 ...


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People it is all about traction. It seems like too simple of an answer but that is all it is. More contact with the ground provides more friction and less slippage. It is not about torque. Torque is the rotational force about the axle. There is more torque required to spin a larger wheel than a smaller wheel so it would be better to have a smaller ...


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Your assertion that spinning the glass causes the liquid in it to also spin may contain only a grain of truth and a lot of optical illusion. It is extremely difficult to see the motion of water or even just the exact position of its surface; especially with calm water, this is a frequent cause of misjudged landings for pilots of sea or amphibious planes. ...


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Gore-tex is very porous. This lets water vapor (and air) out, but the pores are not large enough to let liquid water in. The reason water cannot go through the pores is because they are only 1 micrometer larges. So, water vapor can diffuse through but water in liquid form cannot pass through. source 1 and source 2.


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In short, the movement of an ice cube in water lags relative to the movement of the container because the ice cube's viscosity is sharply higher than that of the surrounding water. The effects of inertia might be more easily imagined by simplifying the components to a slowly-melting ice cube sitting on a smooth/flat platter. If the platter is slid briskly ...


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If the liquid were really rotating in the glass, the ice cubes would rotate with it. What you are (probably) seeing is the superposition of two perpendicular resonant waves sloshing back and forth, but not rotating. Here is how it works: Imagine that, instead of moving the glass in a circle, you just move it back and forth in an east/west direction. This ...


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Well there is a huge difference between these two things. As you mentioned temperature is the movement of atoms and describes, on average, how fast molecules and atoms are moving about. The movement can be transferred through any surface because it is energy! Though some objects might transfer heat very slowly, nonetheless the transfer occurs. Hence when ...


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A domestic humidity meter like this one currently sitting on my desk: measures relative humidity. Relative humidity is the water concentration as a percentage of the maximum concentration. But the maximum concentration is a function of temperature, so for a given amount of water in the air the relative humidity is also a function of temperature. In my ...


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To get the ice cube to twirl by pure twirling of the glass, there need to be viscous stresses applied to the ice cube from the spinning water. To simplify matters, lets say that the water in your glass is perfectly still before you start twirling, that the ice cube is away from the edge of the glass, and that the twirling is initiated smoothly so that ...


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The LCD panel consists of elements shown in the figure below. The unpolarized light from backlight panel travels through polarizer, after which the light is linearly polarized. TFT panel controls the voltage on the liquid crystal, voltage applied will cause the liquid crystals to "twist" and thus rotate the polarization of the light. Light then passes the ...


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The air in the freezer is a poor conductor of heat. The greater surface area of the porous paper along with its heat conducting water allows it to act as a heat sinc. It transfers heat from the liquid to the glass or aluminium and then to the water in the paper which sheds the energy by conducting it to the surrounding materials such as the air and the ...



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