Why does the lennard-jones potential have its minimum at a distance of rm=2^1/6sigme

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

What kind of simple machine is a catapult?

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.