'At 15 on the modified Mohs' scale, this substance still has the highest hardness number'
a diamond
PHYSICAL SCIENCE: At 15 on the modified Mohs' scale, this substance still has the highest hardness number
At 15 on the modified Mohs' scale, this substance still has the highest hardness number
At 15 on the modified Mohs' scale, this substance still has the highest hardness number
PHYSICAL SCIENCE
a diamond
PHYSICAL SCIENCE