2015年3月31日，世界上最先进、不耗一滴油的太阳能飞机“阳光动力2 号”降落在重庆江北国际机场（如图所示）．飞机虽然体积庞大，但质量只有2.3t，与一辆家用汽车相当．其72m长的流线型机翼上共有17248块太阳能电池板，不仅可以给飞机的电动机供电，还能给飞机的锂电池充电，以满足夜间飞行的需要．“阳光动力2号”的成功飞行证明了人类可以用清洁能源创造奇迹．

请找出一个与以上情景有关的物理信息，并指出对应的物理知识，不得与示例重复．

示例：物理信息：电池板给锂电池充电；

物理知识：电能转化为化学能．

作答：物理信息：____；

物理知识：____．

将塑料绳的一端扎紧，尽可能将其撕成更多的细丝，用干燥的手从上向下捋几下，观察到如图所示的现象．这是因为塑料丝带了____电荷（选填“同种”或“异种”），这种使塑料丝带电的方法称为____，塑料丝带电的实质是____在物体间转移。

已知函数f（x）=sin²x﹣ $\sqrt{3}$ sinxcosx+ $\frac{1}{2}$ ，g（x）=mcos（x+ $\frac{\pi }{3}$ ）﹣m+2

如图，四边形ABCD中，∠A=90°，AB= $5\sqrt{3}$ ，BC=8，CD=6，AD=5，试判断点A、B、C、D是否在同一个圆上，并证明你的结论．

阅读下列短文，从A、B、C三个选项中选出一个能正确填入相应空格内的最佳答案。

    How would you use a radio or a telephone if you had no electricity or batteries? This 1 bothered (使烦恼) British inventor Trevor Baylis. So in 1996, he 2 a wind-up (装有发条的) radio. It doesn't need any 3 or batteries. You wind it up by hand. It plays for about an hour. Then, you wind it up 4, and it plays for another hour. Today it's made in South Africa.

    Then in 1999, Baylis invented a mobile telephone that is powered by 5.The shoes have a small battery that is powered when you 6. This battery is connected to a mobile phone.

    These two simple inventions can bring 7 communications to all parts of the world. Baylis doesn't have a university degree in engineering. In 8, he left high school before graduating. He just loves 9 things to help people. He never knows when 10 will come to him. The idea for the telephone came to him in a dream.