Acar moves from a to b at a speed of 50km per hr and comes back from b to a at a speed of 30km per hour. find its average speed during the journey

What are the applications of electromagnetic waves

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.

What is the relationship between wavelength of light and the quantity of energy per photon?