Which of these changes would notcause an increase in the pressure of a contained gas? The temperature is increased.
More of the gas is added to the container.
The average kinetic energy of the gas is increased.
The volume of the container is increased.

Ibelieve the answer is d. bleachhope my answer has you : )

They cool it down and aluminum cools easily

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -

The disturbance is only parallel to the motion of the wave.