решение. 1. ri=2*r; rii=r/2; ri/rii=4; не надо ни о какой площади сечения говорить. два куска проволоки содинили последовательно, получили ri=2*r; два куска той же проволоки соединили параллельно, получили rii=r/2; ну, а теперь раздели первое на второе!
а теперь общий случай: ri=r*n; rii=r/n; ri/rii=n^2; кусок проволоки разрезали на n одинаковых кусков. сначала эти куски соединяют последовательно: ri=r*n; затем соединяют параллельно rii=r/n; ну и дели первое на второе и делай выводы.
ответ:Task 1:
1.Sweet potatoes are often touted as being healthier than white potatoes, but in reality, both types can be highly nutritious. While regular and sweet potatoes are comparable in their calorie, protein, and carb content, white potatoes provide more potassium, whereas sweet potatoes are incredibly high in vitamin A.
2.Omega-3 supplements have been shown to improve liver function in some patients with non-alcoholic fatty liver disease. Research led by Professor Christopher Byrne has shown that taking omega-3 supplements could be beneficial for some patients with non-alcoholic fatty liver disease (NAFLD).
3.One fact is clear for chocolate: the purer and darker the chocolate, the greater your health benefits. Raw chocolate or minimally processed dark chocolate high in cocoa solids is healthier than milk chocolate and white chocolate. Dark chocolate has anywhere from 50 to 90 percent cocoa solids, while milk chocolate is typically 10 to 30 percent. White chocolate is pure cocoa butter and doesn't offer you any health benefits.
4.Is it better than sugar? Honey has a lower GI value than sugar, meaning that it does not raise blood sugar levels as quickly. Honey is sweeter than sugar, so you may need less of it, but it does have slightly more calories per teaspoon so it's wise to keep a close eye on your portion sizes.
5.They also provide some nutrients for its growth. Egg whites are made up of around 90% water and 10% protein.
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