Answer
C .The final velocity is half of train car B’s initial velocity
Explanation
According to the law of conservation of momentum given by the product of mass and velocity, the velocity will be slightly that of the initial one due to increased mass (double mass). Here at least half of the kinetic energy is lost. Momentum is conserved but kinetic energy is converted to other energy forms after an inelastic collision. Kinetic energy is conserved in elastic collisions.
Answer:
Cl2 at 250 K < Cl2 at 300 K < H2S at 250 K < H2S at 300 K.
Explanation:
From the negative side of the molecule.:)