Asbestos is a fibrous silicate mineral with remarkably high tensile strength. but it is no longer used because airborne
asbestos particles can cause lung cancer. grunerite, a type of asbestos, has a tensile strength of 15 x 102 kg/mm2 (thus, a strand of grunerite with a 1-mm2 cross-sectional area can hold up to 15 x 102 kg). the tensile strengths of aluminum and steel no. 5137 are 25 x 104 iblin2 and 5.0 x 104 iblin2, respectively. calculate the cross-sectional area (in mm2) of wires of aluminum and of steel no. 5137 that have the same tensile strength as a fiber of grunerite with a cross-sectional area of
1.0 micro. mz