Electromagnetic waves travel at 3.0 x 108 m/s. The visible range has wavelengths ranging from about 760 nm in the red region to about 400 nm in the violet region. What is frequency range of visible light?

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.