填空题 适中0.65 引用1 组卷83
上完体育课后,从学校小卖部买了一瓶纯净水。
(1)纯净水瓶标签上有“净含量550mL”字样,则该瓶纯净水的质量为______ kg;
(2)如图所示,向空纯净水瓶内倒入热水迅速倒出并盖紧瓶盖,瓶子变瘪了,证实______ 的存在;
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753483846467584/2756970453868544/STEM/6fd0e06e-4268-449f-8a0e-96d502e3968b.png)
(3)如图所示,用一根细绳拉着空纯净水瓶在光滑的桌面上做匀速圆周运动,空纯净水瓶的运动状态______ (选填“发生”或“没有”)变化;
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753483846467584/2756970453868544/STEM/b6aa73f4-9223-4eb6-a281-b832298fc28a.png)
(4)用手握住竖直的纯净水瓶不动(如图),然后逐渐加大握瓶子的力,则该瓶子受到的摩擦力的大小______ (选填“变大”、“变小”或“不变”)。
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753483846467584/2756970453868544/STEM/36bb444b-9e13-478b-bbf9-778916102472.png)
(1)纯净水瓶标签上有“净含量550mL”字样,则该瓶纯净水的质量为
(2)如图所示,向空纯净水瓶内倒入热水迅速倒出并盖紧瓶盖,瓶子变瘪了,证实
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753483846467584/2756970453868544/STEM/6fd0e06e-4268-449f-8a0e-96d502e3968b.png)
(3)如图所示,用一根细绳拉着空纯净水瓶在光滑的桌面上做匀速圆周运动,空纯净水瓶的运动状态
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753483846467584/2756970453868544/STEM/b6aa73f4-9223-4eb6-a281-b832298fc28a.png)
(4)用手握住竖直的纯净水瓶不动(如图),然后逐渐加大握瓶子的力,则该瓶子受到的摩擦力的大小
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753483846467584/2756970453868544/STEM/36bb444b-9e13-478b-bbf9-778916102472.png)
20-21八年级下·江苏宿迁·期末
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