Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
سلام لطفا این سوال من و حل می کنید با توضیح @همیار @دانش-آموزان-آلاء @یازدهم فیزیک