Explain what may happen went to light waves traveling from opposite directions meet?

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.