Е(к)=(mv^2)/2=>m=2E(k)/v^2=2×100Дж/25м/с=8кг
Напряжение на концах проволоки U=i*R=0,009*4,8=0,0432 В. Тогда искомое напряжение U1=U*50/800=U/16=0,0027 В. Ответ: 0,0027 В.
F=mg
a) 0.008*10=0.08H
b)1500*10=15000H
2 задание : How much potatoes is there .Not mush
How much Lemonade is there. Not mush
How much milk is there. Not mush
How much bread is there