Ввершинах каадрата со стороной a расположены одинаковые точечнве заряды (+q), а в центре - точечный заряд (-q). сила, действующая на заряд (-q), равна: 1) qq/2πe0a^2 2) qq/πe0a^2 3) qq√2/πe0a^2 4) 0

1. nelly and ann were moving into a new flat at 11.30

2. mrs brown was selling vegetebles at 5.45 yesterday

3. the greens were sailing to st.peterburg at 8.00

4. pete and jack were fighting each other at 7.00

5. bill was preparing for his classes at 10.15

6. andrew and ted were listening to music at 4.30