Электрическую лампу сопротивлением 240 Ом , рассчитанную на напряжение 120 В надо питать от сети напряжением 220В ...   Какой длины нихромовый проводник площадью сечения 0,55 мм в квадрате надо включить последовательно с лампой? P = 110* 10 в минус 8 степени Ом * м. Ничего не смыслю в физике! Помогите, пожалуйста, и поподробнее (для тупых) :D )) заранее спасибо)!

СОКРАТИТЕ ПОЖАЛУЙСТА,ТОЛЬКО ЧТОБЫ СМЫСЛ ОСТАЛСЯ,НЕНУЖНО ДО 1 ПРЕДЛОЖЕНИЯ,ПРОСТО ЧУТЬ-ЧУТЬ ПОМЕНЬШЕ,ЛИШНЕЕ УБРАТЬ.

Nora

I've just done a degree in Drama and education, so I'll probably end up teaching drama in a secondary school, I suppose, but I'm not going to apply for anything this year. Right now, I want to get away from education and do some travelling, probably to the West Indies. I've got family in Trinidad, so I'm hoping to go there for a few months, and maybe find some kind of job there.

Dino

I'm just finishing my final exams in fashion, and it's been incredibly hard work. So first I'm having a holiday with my family back home in California. I'm leaving in five days, I'm so excited! After that I'm planning to do a master's degree in Fashion design, I've applied for a course, and I've been accepted if I get good grades in my exams, so I'm hoping!

Caroline

I'm about to graduate in modern languages, Spanish and Russian and I've already been accepted for a job as a trainee manager with an international clothing company. I'm due to start work at the beginning of September, so I'm having a couple of months' break over the summer. I'm going to find a beach somewhere nice and hot for a couple of weeks in August, hopefully, and then after that I'll start work. I'm really looking forward to it.

Alice

I've just finished a law degree, but I'm definitely not going to be a lawyer. I've realised I hate the law! I've basically got no idea at all what I want to do. I suppose I'll do some kind of temporary job for the next few months; work in a shop, or do telephone sales or something, and then see what happens. Hope that I get some ideas!

вычислите значение выражения sin^2*60 градусов -3*tg 45 градусов

Помогите!!!к 80 г 8% раствора сахарозы добавили 60 г сахарозы и долили 20 г воды Какова массовая доля полученного раствора.