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SteveThe term "porous water-absorbing mass of fibers" typically refers to a material known as a "sponge." Sponges are made up of a network of interconnected fibers that create small empty spaces, allowing them to absorb and hold water. The porous nature of sponges is due to their high surface area, which enables them to efficiently soak up liquids.
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What is the formula for a sphere mass?
how do you find the mass of a sphere Volume x density => 4/3(pi)(r)3 x density
What is the radius of a solid aluminum sphere that has a mass of 87g in inches?
Mass = 87 grams and density of aluminium = 2.7g/cm3 So volume of spere = Mass/Density = 87/2.7 = 32.22... cm3 Then V = 4/3*pi*r3 = 32.22.. cm3 r3 = 32.22...*3/(4*pi) = 7.6925 so that r = 1.97 cm = 0.78 inches.
What is the mass of solid iron wrecking ball with a radius of 18cm with solution?
Formula for sphere volume: 4/3πr³ Plug in 18 for r; the volume is 24429 cm³. Density of iron: 7850 kg/m³ 24429 cm³ • 7850 kg/m³ = 191.76765 kg
What is the 118th sequence in y-r-r-y-r-r-y-r-r-y-r-r-y-r-r?
It is y. Every third letter is r, immediately followed by y, and since 117 is divisible by 3, it is r. Therefore, 118 is y.
Prove that nCr plus nCr minus 1 equals n plus 1Cr?
nCr + nCr-1 = n!/[r!(n-r)!] + n!/[(r-1)!(n-r+1)!] = n!/[(r-1)!(n-r)!]*{1/r + 1/n-r+1} = n!/[(r-1)!(n-r)!]*{[(n-r+1) + r]/[r*(n-r+1)]} = n!/[(r-1)!(n-r)!]*{(n+1)/r*(n-r+1)]} = (n+1)!/[r!(n+1-r)!] = n+1Cr
