calculate per unit...急

MandM

2009-03-23 12:52 am

Calculate the mass of fluid absorbed per unit mass of fiber:

Fiber, First value(dry fiber), Last value(fiber absorbedwith water)

Nylon, 9.1g, 27.2g

Rayon, 2.4g, 24g

Cotton,1.6g, 47g

Knitted cotton, 22.3g, 109.4g

Tissue paper (Cellulose), 2.5g, 21g

Wool, 4g, 34g

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回答 (1)

vincent_kl_tam

2009-03-23 9:15 pm

✔ 最佳答案

Mass of fluid absorbed per unit mass of fiber = last value / first value
Mass of fluid absorbed per unit mass of nylon
=(27.2-9.1)/9.1
=1.99g(cor. to 3 sig. fig.)
Mass of fluid absorbed per unit mass of rayon
=(24-2.4)/2.4
=9.00g(cor. to 3 sig. fig.)
Mass of fluid absorbed per unit mass of cotton
=(47-1.6)/1.6
=28.4g(cor. to 3 sig. fig.)
Mass of fluid absorbed per unit mass of knitten cotton
=(109.4-22.3)/22.3
=3.91g(cor. to 3 sig. fig.)
Mass of fluid absorbed per unit mass of tissue paper (cellulose)
=(21-2.5)/2.5
=7.40g(cor. to 3 sig. fig.)
Mass of fluid absorbed per unit mass of wool
=(34-4)/4
=7.50g(cor. to 3 sig. fig.)

參考: http://hk.knowledge.yahoo.com/question/question?qid=7009031901226

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