Ronnie wants to investigate the effect of height on the number of times a ball bounces back. He drops the ball from three different heights (1 m, 1.5 m, and 2 m). If the ball bounces back 12 times from the 1.5 m height, which of the following is a possibility for how many times the ball bounces from a 1 m height?

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

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

a polar bond is formed when electrons are shared unevenly between atoms