中国首艘国产航母命名 最高票竟然是“台湾号”
百度 政府应该发挥自身职能优势，提供研究资金，尤其针对非热门项目。
Concerns the application of the laws of physics to analyze common situations encountered in everyday life.
3 questions from the last 30 days
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Do water heaters create visible ripples in the surrounding water? [closed]
I have an aquarium and around the heater there are ripples in the water.
Do aquarium heaters create ripples in the surrounding water?
If so, why does this happen?
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Does heat pump work more efficiently than electric heater? [duplicate]
My question comes from another very simple question: If I want to heat my house by a electric heater or a heat pump driven by electricity, which cost me more? As far as I've learned, the efficiency of ...
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Why do shadows appear to merge at a specific distance? [closed]
I've observed an interesting phenomenon with shadows that I'm hoping someone can explain. When two distinct shadows are cast near each other by separate, parallel light sources (or even a single ...
