2016年中考物理知识点-汽车与声学和热学
想要学好物理其实很简单，关键要付诸行动：上课认真听、作业认真做、笔记认真记，课后看定义和概念、总结解题技巧，整理疑难问题和错题，这些都是要坚持做到的。现在就让学大教育小编带领大家先整理好2016年中考物理知识点-汽车与声学和热学。一、汽车与声学
1、发声的喇叭是声源，喇叭声是通过空气传播到我们的耳朵的。
2、发动机的声音要尽量消除(发动机上装配消音器)，这是在声源处减弱噪声。
3、为减轻车辆行驶时的噪声对道旁居民的影响，在道旁设置屏障或植树，这是在传播过程中减弱噪声。
4、在某些路段，禁鸣喇叭，是在声源处控制噪声产生。
二、汽车与热学
1、汽车发动机常用柴油机或汽油机——它们是内燃机，利用内能来做功。
2、汽车发动机外装有水套，用循环流动的水帮助发动机散热，利用水的比热容大。
3、冬天，为防冻坏水箱，入夜时要排尽水箱中的水，防止热胀冷缩的危害。
4、小汽车的后窗玻璃板中嵌有一道道的电热丝，它可以防止车内形成的雾气附着于玻璃上并凝结。
5、特别是在夏天，刚坐进汽车或有汽车从你身旁驶过时，会闻到浓浓的汽油味，说明汽油分子在运动，而且在温度高时汽油味更浓，说明温度越高，分子运动速度越快。
6、空调车车窗玻璃设计成双层的，防止热传递。
7、汽车在行驶时，发动机的温度会升得很高。为了确保安全，可用水循环进行冷却。实际上，水中往往还要加入不易挥发的防冻液(原液)，加入防冻液后的混合液冬天不容易凝固，长时间开车也不容易沸腾。这是因为加入防冻液后降低了水的凝固点，提高了水的沸点。
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WRtfXjHK6AXSF5Fpffx+U+Eqfruv0jiPHH0iMg3FjY1rYAcNCUERoYYpP/v25+O7jmj+S+4rqBNLTv7SyZZomf+ZF/8rMK/p7DvPHt4OxY9PCDhgWgiJCC1PA/v1bQp4Ao+xpYQcMC0ERoYUpmD8ICWCUPS3sgGEhKCK0MAXzByEBjLKnhR0wLARFhBamYP4gJIBR9rSwA4aFoIjQwhTMH4QEMMqeFnbAsBAUEVqYgvmDkABG2dPCDhgWgiJCC1MwfxASwCh7WtgBw0JQRGhhiqP8wYULFy5cuHDh8qYlmz/enX0IsQZG2dPCDhgWgiJCC1MwfxASwCh7WtgBw0JQRGhhCuYPQgIYZU8LO2BYCIoILUzB/EFIAKPsaWEHDAtBEaGFKZg/CAlglD0t7IBhISgitDAF8wchAYyyp4UdMCwERYQWpmD+ICSAUfa0sAOGhaCI0MIUzB+EBDDKnhZ2wLAQFBFamIL5g5AARtnTwg4YFoIiQgtTPJA/6roehkFEnHPFHn3f735HXddlWW7b13V1zq3rmrQ756Zp2q6/LEtVVcdr6mcm68zzHD/I4ZzLKXiKohCRcRzLsizLchxH37emacqyLIqirutlWY4/h9gEY8emhR0wLARFhBameGz8o+u6vu93D+R93+8evNuI3VfLslyWZTfQKD5PJB+yrmtRFNv40rZtXdf+6UP54zRUaf7QPi/LorlK40icReIOkC/iYMfWTZ+0KLn27Uv38BKLg7fcw+8ttrvzWzp6yEMWz7Xfw+9Fvm5znHb1K3aN45fsFNXV8y/Xxz/atu26Th/3fZ+LIHrkHsdRP6Ft2yQozPO8Ldy2bZNG/y5NKrudPCim0/EP/8Y4f/gUQgDYLfvdsomf5h5vn97D7y2Sd728h1d4ocXpS+/jusUT7XfyEpFknVf27xrPFdX2qXzJrpG8en39e7iaP4ZhcM7paYUr4x96PiI5OTLP824EUfz6ZVkmoxqaP/zToii2gx9FUczz3HWdH4dQtuMfyUcdkGj6N8bnX3x+IgBc/B+L3R+j03fdxqss9KmpH1nliW1h3OI37ffwQpHjl97KcyMH21e/YtdIGk3tF8oD4x/TNOlphdPxDx3qyB3UfUTQUzmaIdZ11VGEvu/jlfXkyzZ/DMOwPTMyz/O6rnVdt22rASVH/K7cP81B/ojh4AcSzB/bx8Z/ZJk/7oH5Y/v4KyyOe2unqF5z/Uvf9zpN9QB/qkUjiIi0basPyrL0oybTNOXyhzbG0yziuOCcG8dR33s6/pHrZJI/bP4okNfywpGDJOneye8tLu4jb4X542L7Pfzl/JGrN/sWp721U1Tn+aOqqnVd41Mt8zz7+aHxxSy5MZIimk/q0bEK51zTNEVR+OjQtq1Gmd35H/JzqmlRFPFVJ3ouRs7mn+Y6qTB//DU4/rFtN/4je2VbfHAnZf643n4Dv7T46l3ju/PHPM/bUyT+cpiyLOO5HbmLTeK84mmaxjnnnNO5FDoPdBgGPxFkd/zDv1fHS5J/Rx+Srl//ckxuO+WuFibfCPOHZEL5m7p6APPHxfZ7wBB5buZE/PS7do3T3topqpP80fd90zTyc6qpJo+6rpND+8X8odM+uq6L26uqmuc5vl7mIH9sG+d5bpommUeSoP3XNUVkGAY/0OK/NB7OOdhI4zjyalsYmD+O33Inr51F+ykwDtvyOpEvsjjtqvFd48pLdjbH+f3H/LxRnz/8pFQRieeEXswf4zhqAojbp2mqqiq+Cuah/NF1nX5m0u671HWdv5GadjjOEMW/y2r8lJTcN3r0NJAfBdFrfw7WJ2b5/YlVCwe/F54ePmh/N6+ysPMLm8D8cT/PFdXFt9zGn8sf8fWues5Fb/c5DIM/cjdN42eeXpz/Ec/w8O3jOBZFUdd1kj8OBpH0ZI0+9jlJft50xM8v0Vks/nSSt0vero06p+R0I2mC0b7FWYR8F8cX1ie1l6vGg0K9h5dYxCu8pZdnvGpbvLeXZzxncbH9Tl4lckdf81y3KDbsvvG93c3w0LaIV3ho/Ru4mj/ifKB39/KHWH/c1eO6Nl4c/9D7d8XtTdNUVbUsi0YKjQK58Y+qqvSr/ZpxTtK7dOS6lFzB6+9uEl+/03XdNE0f32fIbWDc2JgWdsCwEBQRWpjik39/Lr5PueaP5A6ky7Jc+ZssMf6SXb0RSHxFzNPzT5k//g4YOzYt7IBhISgitDAF//4tIQGMsqeFHTAsBEWEFqZg/iAkgFH2tLADhoWgiNDCFMwfhAQwyp4WdsCwEBQRWpiC+YOQAEbZ08IOGBaCIkILUzB/EBLAKHta2AHDQlBEaGEK5g9CAhhlTws7YFgIiggtTMH8QUgAo+xpYQcMC0ERoYUpjvIHFy5cuHDhwoXLm5b9/EEIIYQQcgPMH4QQQgi5G+YPQgghhNzN/wEyacLFeLBMdgAAAABJRU5ErkJggg==
8、大雪天气曾导致我国大部分地方气温降至零下5摄氏度以下，很多车辆因为水箱中的水凝固成冰而不能正常运转。在有关技术部门的建议下，司机们在水中加入一定量的酒精，问题便得到解决。这说明：与水比较，酒精和水的溶液凝固点较低。
9、冬天汽车前玻璃窗的雾气是由于车内的水蒸气遇到温度较低的玻璃，放出热量液化形成的小水珠。可以打开空调对着车窗吹暖风，使小水珠吸热加快蒸发成水蒸气，车窗玻璃就变清晰了。
以上是学大小编为大家提供的2016年中考物理知识点-汽车与声学和热学，更多内容请关注学大教育官网中考物理栏目。
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