Carry out these steps, and record the findings in the table. Use the gram scale to measure the mass of 2, 4, and 6 paper clips. Fill the graduated cylinder with 8.0 mL of water. Add 2 paper clips to the water in the graduated cylinder. Determine how much the volume of water increases. This increase in volume is the volume of the paper clips. Record the value. Repeat this process to find and record the volume of 4 paper clips and then 6 paper clips. Density is mass in grams divided by volume in cubic centimeters (cm3). One mL is equal to 1 cm3. Calculate and record the density of the steel used in the paper clips.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n