骑师
发表于 2025-3-28 16:56:09
What is Energy?logical existence, for the atmosphere’s warmth which embraces us, for the light by which we see, and for the power by which we move. In fact, even matter itself can be viewed as a form of stored energy.
调色板
发表于 2025-3-28 22:26:06
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险代理人
发表于 2025-3-28 22:56:33
How Do We Get Our Energy Right Now?a force pushing through a distance, whereby we say “work is done.” We can feel the essence of motion (or kinetic energy) in the concept of the . of a body, and in the push necessary to make it attain its velocity. We have also seen that bodies can have potential energy as a result of their position
Meditate
发表于 2025-3-29 04:10:58
Fission Reactors—What Can Go Wrongear attacks in wartime; cancer in the later lives of many of us; genetic defects in future generations of mankind; accumulation of waste products that could be lethal; and even the possibility of terrorist threats that could make airplane hijacking look like simple street muggings. We will discuss a
Climate
发表于 2025-3-29 09:06:54
Dreaming about the Future: Abundant Clean Energy from Atomic Fusionof the air. The heat given out in such reactions is used to vaporize water, producing steam power to drive turbines and generators, and give us electricity. In the preceding chapters, we have discussed the prospects for a transition from chemically generated energy to energy derived from atomic fiss
Preamble
发表于 2025-3-29 12:30:40
Converting Solar Energy to Useful Fuelb different amounts of heat. For example, something which is dark gets warmer than something which is light in color. The reason is simple. Black objects absorb light, so that no light is reflected from black surfaces to our eyes. The light, once absorbed, is converted to energy of motion, causing t
Defiance
发表于 2025-3-29 15:55:47
Household Energy from the Sunnergy load in industrialized countries like the U.S. It would therefore be very worthwhile to get this energy directly from the sun by collecting it on rooftops, at least in the sunnier parts of the world. A pioneer in this field is seen in Figure 11.1.
PRISE
发表于 2025-3-29 19:45:33
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resilience
发表于 2025-3-30 00:47:12
Tides, Geothermal Heat, and the Big Windsd mainly to drive machinery for farming industry, i.e., grinding grains. Modern wind generators can be seen on farms today. The rotors have generators linked to them, often behind the rotor. Such a generator is small and produces 1 or 2 kW, even in fairly strong winds of 20 km/hr. The modern wind ge
AVOW
发表于 2025-3-30 06:57:01
Energy Storage and Transmissionliance upon fossil fuels will end within the lifetime of many of the readers of this book, and we must build a system for collecting and distributing inexhaustible clean energy in less than 50 years. If we fail to do this, our civilization will be in doubt.