Sodium (Na) is very reactive because it does not have a full valence shell.
Answer:
![E=8.13\times 10^{12}\ J](https://tex.z-dn.net/?f=E%3D8.13%5Ctimes%2010%5E%7B12%7D%5C%20J)
Explanation:
Given that,
The mass of a Hubble Space Telescope, ![m_1=1.16\times 10^4\ kg](https://tex.z-dn.net/?f=m_1%3D1.16%5Ctimes%2010%5E4%5C%20kg)
It orbits the Earth at an altitude of ![5.68\times 10^5\ m](https://tex.z-dn.net/?f=5.68%5Ctimes%2010%5E5%5C%20m)
We need to find the potential energy the telescope at this location. The formula for potential energy is given by :
![E=\dfrac{Gm_1m_e}{r}](https://tex.z-dn.net/?f=E%3D%5Cdfrac%7BGm_1m_e%7D%7Br%7D)
Where
is the mass of Earth
Put all the values,
![E=\dfrac{6.67\times 10^{-11}\times 1.16\times 10^4\times 5.97\times 10^{24}}{5.68\times 10^5}\\\\E=8.13\times 10^{12}\ J](https://tex.z-dn.net/?f=E%3D%5Cdfrac%7B6.67%5Ctimes%2010%5E%7B-11%7D%5Ctimes%201.16%5Ctimes%2010%5E4%5Ctimes%205.97%5Ctimes%2010%5E%7B24%7D%7D%7B5.68%5Ctimes%2010%5E5%7D%5C%5C%5C%5CE%3D8.13%5Ctimes%2010%5E%7B12%7D%5C%20J)
So, the potential energy of the telescope is
.
Dddddddddddddddddddddddddddddddddddddddddddddddddddddd