Krople deszczu mają kształt kuli. Oblicz ile kropli dszczu o średnicy 1mm wpadło do naczynia o objętości 40cm3.
d=1mm
R=1/2d=0,5mm
V=4/3 R^3 pi
pi=3,14
V=4/3*0,5^3*3,14=1,57/3 mm^3
40cm^3=40000mm^3
40 000:1,57/3=40 000*3/1,57=120000/1,57=76 433 kropel
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d=1mm
R=1/2d=0,5mm
V=4/3 R^3 pi
pi=3,14
V=4/3*0,5^3*3,14=1,57/3 mm^3
40cm^3=40000mm^3
40 000:1,57/3=40 000*3/1,57=120000/1,57=76 433 kropel