油的十慢具混耐川才价矛架形燃点和沸点:外出就餐如何辨别口水油?
科普中国??科学原理一制胡缩其厂千总员测点通知识点:由于油的燃点和沸点都比水高,如果油脂当中混有微小的水滴,在受热之后,水滴会在油中迅速汽化,冲破油膜,产会请线生爆炸的效果。由于...
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卢瑟福 粒子散射实验中为何使用的是金箔来其?
卢瑟福粒子散射实验中为何使用的是金箔?方颖(浙江省宁波市奉化中学315500)在高中物理《原子的核式结构原子核》的一课中卢瑟福粒子班画实流象侵散射实验中是用射线打击金箔,课后有学...
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最常见的放射性物品
1、光泽度杂志纸。如果一家杂志出版商想花点钱,它可能会开始在光滑的纸上印刷,主要是因为它看上去更好看,但也因为消费者看到杂志封面十分有光泽的来自话,更有可能会想买东西。让纸看起来...
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原子结构理论来自发展史。
1897年,J.J.汤姆逊在研究阴极射线的时候,发现了原子中电子的存在。这打破了从古希腊人那里流传下来的“原子不可分割”的理念,明确地向人们展示:原子是可以继续分360问答割的,...
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有哪些经典的哲学问题?
经典的哲学问题:为什么哪里都有“存在”而没有绝对的虚无?我们的宇宙真实吗?我们有**意志吗?造物主存在吗来自?死后有余生吗?我们能真正客观地体验一切吗?最好的道德体系是什么样的?...
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有哪些经典的哲学问题?
经典的哲学问题:为什么哪里都有“存在”而没有绝对的虚无?我们的宇宙真实吗?我们有**意志吗?造物主存在吗?死后有余生吗?我们全并活能真正客观地体验一切吗?因必请犯述委明章属最好的...
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有哪些经典的哲学问题
经典的哲学问题:为什么哪里都有“存在”而没有绝对的虚无?我们的宇宙真实吗?我们有**意志吗?造物主存在吗?死后有余生吗?我们能真正客观地体验一切吗?最好的道德体系是什么样的?数字...
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怎样应用物理学史进行科学方法教育
现代物理教育血统打年水营员望叫观认为,知识是学生发展的载体,在教育教学过程中,最重要的不是学生学到了多判建系孩染少知识,而是对科学的亲近感,是掌握探索客观世界、进行科学研究的基本...
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'十大悖论'有哪来自些?
1.电车难题(T360问答heTrolle评延王yProblem)“电车难投帝互就庆源告京题”是伦理学领域最屋线快固据效轻为知名的思想实验之一,其内容大致是:一个疯子把五个无辜的...
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在卢瑟福的α粒子散射实验中,α粒子的能量至少要有多大,才能碰到197Au核的表面?
α粒子和197Au核的半径分别为若要使α粒子碰到197Au核的表面,其动能应满足盖革和马斯登当初做的α粒子在Pt360问答箔上的散射实验,使用的是天然放射源发射的α粒子,能量只有...
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卢瑟福 粒子散射实入刻电还误美验中为何使用的是金箔?
卢瑟福粒子散射实验中为何使用的是金箔?方颖(浙江省宁波市奉化中学315500)在高中物理《原子的核式结构原子核》的一课中来自卢瑟福粒子散射实验中是用射线打击金箔,课后有学生问到“...
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诺基亚 3250和索尼 爱立信的K750C对比
诺基亚3250主要性能和弦铃声64和弦铃音描述铃声和提示音:eAAC+、MPEG4AAC、MP3、ARM-NB、ARM-WB、64和弦MIDI、RealAudioVoice、Re...
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我要去来自切尔诺贝利旅游,要准备什么?
哥们,看了你的问题,原谅我笑了,首先第一,现在切尔诺贝利在外围已经可以**旅游了,没必要冒这个潜入的风险;第二,在你笔守讨去师所能触及的范围内你是不需要用防护服的,小心点的穿长衣...
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