Answer:
We should only agree with the first statement of the first student but not with the second part of his statement. While as the statement of the other student is completely wrong.
Explanation:
The earth and the moon are locked in a process known as tidal locking. Tidal locking occurs when any object which revolves around other object takes the same amount of time to rotate around it's own axis as it takes to revolve around the planet.
This is exactly the case with moon and the earth system ,the moon is tidally locked with earth thus we cannot see the other side of the moon but this side is not dark as claimed by the first student but this side of the moon is also illuminated by the sunlight as the face of moon that we are able to see.
The second student is wrong as we cannot see the other side of moon from earth.
The difference between true north and magnetic north is called "declination."
The density will always be the same.
The derivatife is zero, but your differentiating with respect to V so just treat the constants as numbers and differentiate accordingly
d(nRT/(V-nb))dV = -nRT/ (V-nb)^2
and
d (-an^2/V^2) dV = 2an^2/V^3
Hope this helps
