Answer:
B
Explanation:
Is the equilibrium stable or unstable for the third charge
Answer: You could dissolve it by heating it back up, then just cooling it down again.
Hope that helps!
Work done against gravity to climb upwards is always stored in the form of gravitational potential energy
so we can say
![W = mgh](https://tex.z-dn.net/?f=W%20%3D%20mgh)
here h = vertical height raised
so here we know that
![h = 14.1 sin7.3 km](https://tex.z-dn.net/?f=h%20%3D%2014.1%20sin7.3%20km)
here we have
![h = 1.79 km](https://tex.z-dn.net/?f=h%20%3D%201.79%20km)
now from above equation
![W = (83 kg)(9.81 m/s^2)(1.79 \times 10^3 m)](https://tex.z-dn.net/?f=W%20%3D%20%2883%20kg%29%289.81%20m%2Fs%5E2%29%281.79%20%5Ctimes%2010%5E3%20m%29)
![W = 1.46 \times 10^6 J](https://tex.z-dn.net/?f=W%20%3D%201.46%20%5Ctimes%2010%5E6%20J)
so work done will be given by above value