Questions

The Asia Pacific Summit 2018 began in Kathmandu, Nepal.

Ashok Gehlot is the new Chief Minister of Rajasthan and Sachin Pilot is his Deputy.

No work done as there is no external external pressure in free expansion. 

Hence, Work done in a free expansion process is Zero.

Belarus is a European country whose capital city is Minsk.

The macronutrient water is the most essential nutrient which plays a vital role in every function of the body. Macronutrients are those nutrients that are required in excess amounts for the development and functioning of the body.

True, Stress is a factor that contributes to heart disease risk.

More factors that contributes to heart disease risk are blood pressure, cholesterol, smoking, physical inactivity and overeating.

Resistivity :

Resistivity is a measure of the resistance to the flow of electrons. 

Conductivity :

Conductivity is just the inverse of resistivity, σ = 1/ρ, where σ is conductivity and ρ is resistivity.

Example:

Think of a pipe and water, the bigger the pipe, the easier water can flow and thus the lower the resistance.