Question

Biological tissues are typically made up of

98% water. The density of water is 1.0

Answer 1

?proportion:
1cm^3 ~ 1e-3 kg;
1m^3 ~ m, hence m=1e-3*1e6/1 = 1000 kg = 1 ton;
? assuming 2% is void we get:
m = volume *density *percentage;

mass of the Human heart m = [(4/3)*pi *(4e-2)^3 m^3] *[1000 kg/m^3] *0.98 =0.2627 kg;

mass of cell m with radius 0.25e-6 m = [(4/3)*pi *(0.25e-6)^3 m^3] *[1000 kg/m^3] *0.98 =5.13e-16 kg;

Mass of the Honey Bee m = [pi*(1e-3)^2 *4e-3 m^3] *[1000 kg/m^3] *0.98 =1.2315e-5 kg;
note: v of sphere = (4/3)*pi *r^3, v of cyl = pi*r^2*h;