A catalyst is a chemical substance that affects the rate of a chemical reaction by altering the activation energy required for the reaction to proceed. This is called catalysis.A catalyst is not consumed by the reaction and it may participate in multiple reactions at a time.The only difference between a catalyzed reaction and an uncatalyzed reaction is that the activation energy is different. There is no effect on the energy of the reactants or the products. catalyst is a chemical substance that affects the rate of a chemical reaction by altering the activation energy required for the reaction to proceed. This is called catalysis.
A boater hat, also known as a sennit, basher, skimmer, or sailor, is a distinct type of straw hat. This piece of headwear has a stiff flat top and brim. A wide ribbon or piece of material is often wound around the crown of the hat.
A slouch cap is a distinctive hat with a wide brim and chinstrap that is typically made with wool or other animal felt.It is usually part of a military or police uniform and the brim can be worn turned up on either one or both sides of the hat.ariations of the slouch cap have been worn by soldiers for several centuries including those from Britain, New Zealand, France, the United States and Germany. The style is most strongly associated with the Australian military.