Apendulum has 359 j of potential energy at the highest point of its swing. how much kinetic energy will it have at the bottom of its swing?

Explanation:

According to law of conservation of energy, energy can neither be created nor it can be destroyed. It can only be transformed from one form to another.

Therefore, when pendulum is at highest point of its swing then it had only potential energy and zero kinetic energy. But when swing reaches at the bottom then potential energy converts into kinetic energy as height is zero.

Hence,        potential energy = kinetic energy.

Thus, we can conclude that kinetic energy at the bottom of swing of pendulum is 359 J.

The Equation given in statement is as follow,

                              2 C₂H₂  +  O₂     →    4 CO₂  +  H₂O

According to equation,

Carbon atoms on reactant side are 4 in number, and that on product side are also 4 in number. SO, carbon atoms are balanced.

Hydrogen atoms on reactant side are 4, and on product side are 2. Means Hydrogen atoms are not balance. So, to balance them multiply H₂O with 2. So,
                              2 C₂H₂  +  O₂     →    4 CO₂  +  2 H₂O

Now, calculate number of Oxygen atoms on both sides. There are 2 Oxygen atoms on reactant side and 10 Oxygen atoms on product side. So, to balance them multiply O₂ on reactant side with 5. So,

                              2 C₂H₂  +  5 O₂     →    4 CO₂  +  2 H₂O

Above Equation is balanced.