The potential energy of a diatomic molecule (a two-atom system like h2 or o2) is given by the lennard-jones potential upper u equals startfraction upper a over r superscript 12 endfraction minus startfraction upper b over r superscript 6 endfraction comma where r is the separation of the two atoms of the molecule and a and b are positive constants. this potential energy is associated with the force that binds the two atoms together. (a) find the equilibrium separation - that is, the distance between the atoms at which the force on each atom is zero. (b) what is the second derivative of the potential at the equilibrium position?

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)

they should be similar or the same

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.