Viruses..................
Answer:
The definition of atom: The Atom is the basic unit of matter.
Types of atoms: There are 3 types of atoms, protons, neutrons, and electrons.
Density = mass/volume
Since there was no condition of unit attached to the question...
Density = 100g/25.0ml
Density = 4g/mL.......
<u>Given:</u>
Surface area at the narrow end, A1 = 5.00 cm2
Force applied at the narrow end, F1 = 81.0 N
Surface area at the wide end, A2 = 725 cm2
<u>To determine:</u>
Force F2 applied at the wide end
<u>Explanation:</u>
Use the relation
F1/A1 = F2/A2
F2 = F1*A2/A1 = 81.0 N * 725 cm2/5.00 cm2 = 11,745 N
Ans: (b)
The force applied at the wide end = 11,745 N
#3 is the right one I believe