How is nanotechnology useful for the energy sector.

Define Nanotechnology

Wha is menat by free energy of a system? How is it related to enthalpy and entropy of the system? How is it useful for predicting the feasibility of a process?

What is the full form of ALM used in the Finance sector?

How is solar energy used in solar therrnal power plants?: Give one advantages and one disadvantage of this energy.