退休老教师讲物理【初二上】
物理老师卢耀兴...
| Publishes | Twice weekly | Episodes | 45 | Founded | 7 years ago |
|---|---|---|---|---|---|
| Language |  ZH-CN | Categories | CoursesEducation | ||
Listen to this Podcast
Latest Episodes
【期末复习】八年级上学期
同学们好！欢迎来到物理老师讲物理。
期末考试就快要到了。时间过得真快，一晃我们已经一起走过了一个学期。你可能已经发现了，以前每周都更新的，最近空了两周，因为最近我在忙于制作初二下的内容。初二下，内容更难，我做音频课的难度也更大些。但是无论多难，只要时间允许，我还是会坚持做完。应编辑的邀请，新的专辑将会改成收费的精品专辑，音质和内容也会大幅升级。 我打算把下学期的内容制作成3个专辑，力求做得更好，欢迎你继续关注收听。
很多同学在评论里留言，要求我做一个总复习。限于音频的... more
【第6.06讲】生活中的密度
同学们好！欢迎来到物理老师讲物理。人们通常挂在嘴边上的话：石头比木头重；铁块比铝块重。用我们学到的物理知识，同学们辨析一下，这两句话对吗？尽管这两句话听者都能明白，可这种说法是错的。应该说：石头的密度比木头的密度大，铁块的密度比铝块的密度大。
密度与温度关系密切。一般情况下，物体都有热胀冷缩的性质。温度变化时，物体的质量是始终不变的，只有体积随温度变化，由ρ=m/V可知，密度也会随温度而变。温度变化时，气体的体积变动最大，密度变化最明显；固体和液体的体积受温度的影响... more
【第6.05讲】密度测量的6大妙招
同学们好！欢迎来到物理老师讲物理。这一讲我们讨论如何测量物质的密度。我总结了6大妙招，有此6招，几乎可以将密度测量的难题一网打尽。
测物质的密度有多种方法，以后还会继续谈。今天我们只谈利用密度的定义ρ=m/V来测量密度。由ρ=m/V可知，只要测出某物体的质量m，和它的体积V，就可以算出该物质的密度啦。质量可以用天平测量，这个我们已经学过了，很简单。所以问题就只剩下，如何测体积了。测体积，听起来很简单，具体情况还是比较复杂的。
最简单的两种情况，就是液体的体积或... more
【第6.04讲】认识量筒同学们好！欢迎来到物理老师讲物理。前面我们学习了测量质量的工具——天平，现在我们来认识一个测量体积的工具——量筒。量筒是测量液体体积常用的测量工具之一，日后你学化学的时候，还会接触到容量瓶、移液管等更多的测液体体积的工具。物理课目前只要掌握量筒就可以了。
量筒一般都是瘦瘦高高的，一个带有刻度的玻璃筒子。为什么要把量筒做成这个样子呢？这是为了提高测量的精度，与量杯或者带刻度的烧杯相比，量筒的精度更高。加入同样多的液体，瘦瘦高高的量筒，它的液面变化更明显。试想，如果你用洗澡盆... more
Reviews
- 雾里悟物理
嗨嗨嗨嗨嗨啊嗨嗨啊好啊好啊哈
Apple Podcasts5玛卡巴卡的巧克力China3 years ago - 爱辽爱辽
爱辽爱辽
Apple Podcasts5李莘阑China5 years ago - 听后感
贼好了！
Apple Podcasts5往矣升平China7 years ago - 不错啊，怎么没人
刚刚听了六个例题，讲的挺好，不像我们学校老师口音鬼畜
Apple Podcasts5ON喜欢学习China7 years ago
Chart Rankings
How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.
Apple Podcasts | #52 |  Hong Kong/Education/Courses |
Apple Podcasts | #160 | China/Education/Courses |
Apple Podcasts | #221 |  Taiwan/Education/Courses |
Audience Metrics
Listeners, social reach, demographics and more for this podcast.
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退休老教师讲物理【初二上】 launched 7 years ago and published 45 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.
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