问题
填空题
如图是小明在春游时从公园的滑梯上滑下时的情景.请写出两个与此情景有关的物理知识:(1)______;
(2)______.
答案
(1)人从滑下速度越来越快,说明重力势能转化为动能;
(2)下滑过程中克服摩擦力做功,使其内能增加,温度升高.
故答案为:(1)重力势能转化为动能;(2)做功可以改变物体的内能.
如图是小明在春游时从公园的滑梯上滑下时的情景.请写出两个与此情景有关的物理知识:(1)______;
(2)______.
(1)人从滑下速度越来越快,说明重力势能转化为动能;
(2)下滑过程中克服摩擦力做功,使其内能增加,温度升高.
故答案为:(1)重力势能转化为动能;(2)做功可以改变物体的内能.
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1. How many days are there in this month? ______________________________________. 2. What day is the second day of this month? ______________________________________. 3. How many Mondays are there in this month? ______________________________________. 4. What day is the first day of the next (下一个) month? ______________________________________. 5. What date is the last Saturday in this month? ______________________________________. |