6. What happens to the energy of the transition state when a catalyst is used? A. The energy increases.
B. The energy decreases.
C. The energy does not change.
D. The energy varies during the catalyzed reaction.

please please help. Its my only try

D I think the answer is D for this question

is the B

Explanation:

The point of highest energy (point of the activated complex) represents the transition state. With a catalyst, the energy required for the reaction to enter the decay state, therefore, the energy required to start the reaction also decreases.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.