The answer to it will be solar energy had become a hit since the shift of some electrical appliances had adapted itself to solar energy using low energy consumption. There are already discoveries that used this method as an alternative source of energy in houses and buildings. On the other hand, the wind is also a good alternative source of energy. This has been used by in far places.
A)
Obw= 2*3,14*2 =12,56cm
Obw = 6,28*4 = 25,12m
Obw = 6,28*0,3 = 1,884cm
Obw = 6,28*10 = 62,8km
b)
Obw = 6,28*1 = 6,28cm
Obw = 6,28 * 1,5 = 9,42m
Obw = 6,28 *0,2 = 1,256cm
Obw = 6,28 *100 = 628m
c)
6,28*r = 10m
r≈1,59m
6,28*r = 1m
r≈0,159
6,28*r = 628mm
r=100mm
6,28*r = 3,5cm
r≈ 0,557cm
Albert (Jeremy Irvine) and his beloved horse, Joey, live on a farm in the British countryside. At the outbreak of World War I, Albert and Joey are forcibly parted when Albert's father sells the horse to the British cavalry. Against the backdrop of the Great War, Joey begins an odyssey full of danger<span>, joy and sorrow, and he transforms everyone he meets along the way. Meanwhile Albert, unable to forget his equine friend, searches the battlefields of France to find Joey and bring him home.</span>
C. Differing levels of pre- and post- natal care
I don't think we have enough info to answer your question
