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 دلیلش چیه که تغییرات انرژی پتانسیل الکتریکی +تغییرات انرژی جنبشی صفر هست؟
کسی نیست؟