O bara din cupru poate colisa pe doua mine orizontale ad si ce ale caror capete C si D sunt legate la bornele unui generator cu t. e.m. (E = 10 v) si rezistenta interioara (r=0,5) se neglijeaza rezisteanta sinelor si a barei din cupru. a)Ce intensitate are curentul electric ce se stabileste prin circuitb? b)Se aseaza un magnet in forma de u ca in figura alaturata. laturile sale au o latime de 10 cm. Inductia magnetifca a campului magnetic dintre poli este B =0,05 ce se observa daca bara se lasa libera?

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.