Помогите решить задачи по физике, прошу!
1)При перемещении заряда между точками с разностью потенциалов 2 кВ электрическое поле совершило работу 80 мкДж. Чему равен заряд?
2) точечный заряд q=1 нКл  , находясь в некоторой точке поля, обладает потенциальной энергией 1 мкДж. Найдите потенциал этой точки поля.
3)Придумайте свою задачу, в которой необходимо рассчитать потенциал заряженного шара.

1. In the 17th century people (to begin) to limit the number of children they (to have). 2. In many parts of the world greater importance (to give) to the family of blood relatives. 3. In some countries the father (not to support) hiw own children. 4. Probably Asians, like Europeans and Americans (to limit) the size of their families in the nearest future.

1. Too often we take the world around us for granted: the hills seem to stay in the same place year after year, the rivers flow to the sea. 2. The world appears to remain the same. 3. But the scientists found the ice caps of the North and South Poles to be gradually melting. 4. The sea is expected to rise eventually. 5. It's usual for every society to possess stories about its origin and past.