C
The potential energy is mgh, she knows the mass, she needs the acceleration due to gravity and the height of the ball
Answer:
The gravitational attraction between the two objects is
Explanation:
According to universal law of gravitation, the gravitational force of attraction acting between two objects will be directly proportional to the product of mass of the objects and inversely proportional to the square of the distance of separation of two objects.
![F=\frac{GMm}{r^{2} }](https://tex.z-dn.net/?f=F%3D%5Cfrac%7BGMm%7D%7Br%5E%7B2%7D%20%7D)
Here G is the gravitational constant, M, m are the masses of the objects given as 6564300 kg and 5640 kg. And r is the distance of separation given as 50 m.
So ![F=\frac{6.674*10^{-11}*6564300*5640 }{50*50}=0.988 mN](https://tex.z-dn.net/?f=F%3D%5Cfrac%7B6.674%2A10%5E%7B-11%7D%2A6564300%2A5640%20%7D%7B50%2A50%7D%3D0.988%20mN)
So the gravitational attraction of 0.988 mN will be acting between the two objects.
In physical chemistry, the terms body-centered cubic (BCC) and face-centered cubic (FCC) refer to the cubic crystal system of a solid. Each solid is made up simple building blocks called lattice units. There are different layouts of a lattice unit.
It is better understood using 3-D models shown in the picture. A BCC unit cell has one lattice point in the center, together with eight corner atoms which represents 1/8 of an atom. Therefore, there are 1+ 8(1/8) = 2 atoms in a BCC unit cell. On the other hand, a FCC unit cell is composed of half of an atom in each of its faces and 1/8 of an atom in its corners. Therefore, there are (1/2)6 + (1/8)8 = 4 atoms in a FCC unit cell.