文件内容:
file:08-误差.mp4
file:13-速度（上）.mp4
file:05-认识刻度尺.mp4
file:12-时间单位（1秒）.mp4
file:15-平均速度.mp4
file:04-长度单位（1米）.mp4
file:03-长度.mp4
file:02-单位.mp4
file:07-估读.mp4
file:09-间接测长度.mp4
file:10-测曲线长度.mp4
file:01-物理量.mp4
file:11-时间.mp4
file:16-测平均速度.mp4
file:17-匀速直线运动.mp4
file:06-使用刻度尺.mp4
file:14-速度（下）.mp4
file:02-声音的传播.mp4
file:01-声音的产生.mp4
file:10-音色的决定因素.mp4
file:03-传声介质.mp4
file:06-响度和振幅.mp4
file:12-超声波和次声波.mp4
file:09-水瓶琴（实验）.mp4
file:07-音调的决定因素.mp4
file:回声测距.mp4
file:08-音调和频率.mp4
file:04-声速.mp4
file:11-听觉的频率范围.mp4
file:折射现象.mp4
file:01-色光三原色.mp4
file:03-紫外线.mp4
file:05-平面镜成像.mp4
file:07-光的反射定律（下）.mp4
file:06-光的反射定律（上）.mp4
file:02-红外线.mp4
file:04-光速.mp4
file:03-凹透镜.mp4
file:06-照相机原理.mp4
file:凹透镜成像.mp4
file:05-透镜成像（下）.mp4
file:04-透镜成像（上）.mp4
file:02-凸透镜.mp4
file:08-眼睛和眼镜.mp4
file:07-自制照相机.mp4
file:14-实验室测液体密度.mp4
file:06-密度单位.mp4
file:09-影响密度的因素.mp4
file:08-密度全家福.mp4
file:07-水和冰的密度.mp4
file:12-鉴别物质.mp4
file:03-认识天平.mp4
file:13-密度公式的变形.mp4
file:04-使用天平.mp4
file:01-质量.mp4
file:11-量筒的使用.mp4
file:10-体积及其单位换算.mp4
file:02-看得见的1kg.mp4
file:15-实验室测固体密度.mp4
file:05-密度定义.mp4
file:质量单位.mp4
file:15-晶体和非晶体（下）.mp4
file:05-沸腾现象和特点.mp4
file:01-物质状态.mp4
file:17-升华和凝华.mp4
file:07-不同物质的沸点.mp4
file:14-晶体和非晶体（上）.mp4
file:09-蒸发吸热.mp4
file:02-温度.mp4
file:03-看得见的1℃.mp4
file:06-影响沸点的因素.mp4
file:08-蒸发现象.mp4
file:11-降温导致液化.mp4
file:13-熔化和凝固.mp4
file:04-汽化和液化.mp4
file:16-熔点和凝固点.mp4
file:10-蒸发的影响因素.mp4
file:12-压缩导致液化.mp4
file:07-通电螺线管下.mp4
file:05-安培定则.mp4
file:10-电磁感应现象.mp4
file:03-磁感线.mp4
file:02-磁场方向.mp4
file:06-通电螺线管上.mp4
file:04-奥斯特实验.mp4
file:09-通电螺线管的磁极下.mp4
file:08-通电螺线管的磁极上.mp4
file:01-磁场.mp4
file:06-滑动变阻器下.mp4
file:28-基尔霍夫电压定律上.mp4
file:26-串联电路电压规律下.mp4
file:03-定值电阻和半导体元件.mp4
file:25-串联电路电压规律上.mp4
file:07-电阻箱和电位器.mp4
file:04-滑动变阻器上.mp4
file:22-电源下.mp4
file:21-电源上.mp4
file:27-并联电路电压规律.mp4
file:23-认识电压表.mp4
file:29-基尔霍夫电压定律下.mp4
file:02-影响电阻的因素.mp4
file:05-滑动变阻器中.mp4
file:24-电压的测量.mp4
file:01-电阻.mp4
file:19-电势和电压(上).mp4
file:20-电势和电压(下).mp4
file:08-电流表和电压表的内阻.mp4
folder:乐乐课堂-初中物理【2025-01-27】
folder:乐乐课堂-初中物理
folder:八年级上册
folder:九年级全一册
folder:八年级下册
folder:1-机械运动
folder:2-声现象
folder:4-光现象
folder:5-透镜
folder:6-质量和密度
folder:3-物态变化
folder:20-电和磁
folder:16-电压 电阻
folder:13-内能
folder:19-生活用电
folder:18-电功率
folder:14-内能的利用
folder:15-电流与电路
folder:17-欧姆定律
folder:09-压强
folder:10-浮力
folder:11-功和机械能
folder:07-力
folder:08-运动和力
folder:12-简单机械