Which of the following body system does the immune system rely on to provide the first line of defense against pathogens

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

What best discribes the relationship between wavelength and frequency in a electromagnetic wave

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.