What is the question? I think that you answered it yourself...
Answer:
Solids
Explanation:
Solids, liquids, and gases all have mass.
Answer:

Explanation:
*Assume the parallel disks have equal diameters.
Given the electric strength as
transferring
electrons, the disk's Area can be calculated using the formula:

#We now calculate the disks diameter:

Hence, the diameter of the disks is 
Replacement teeth were made even back then out of primitive materials, and pig hair was used like floss