Вопрос школьника по предмету Физика
Чим відрізняються силові лінії магнітного поля від електростатичного?
Ответ учителя по предмету Физика
лінії напруженості електростатичного поля розімкнуті. Вони починаються на позитивних зарядах, закінчуються на негативних і поблизу від зарядженого провідника спрямовані перпендикулярно його поверхні.
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Once upon a time,there was a baby bird with only one wing.The baby bird could not fly.One day the other birds said:»It is very cold here,»and they all flew away.The bird with one wing was very sad.»I can’t fly,»it said,»and I can’t live here all alone!What should I do?»Just then the little bird saw some squirrels.»Please can I live with you?»it asked.»Can you crack nuts for us?»asked the squirrels.»No,»said the bird.»Then you cannot live with us,»they answered.The poor little bird walked on until it came to a fox.»Please can I live with you?»said the bird.»Csn you catch chickens?»said the fox.»No,»said the bird.»Then you cannot live with me,»said the fox.So the bird walked on and on,feeling very sad.Suddenly the little bird saw a treehouse.The bird knocked on the door and Mrs Rabbit openet.»Please,»said the bird with one wing,»I’m all alone.Please can I live with you?» «What can you do?» said Mrs Rabbit.»I can clean yours house,»said the bird.»Come in,then,»said Mrs Rabbit.»That is just what we want!»So the bird with one wing cleaned Mr and Mrs Rabbit’s house and was very happy and warm in the treehouse.Now,every winter when the other birds fly away to warmer places,the little bird stays with Mr and Mrs Rabbit in the treehouse.