Aratio wave travels 186,000 miles per second. how many kilometers will the wave travel in one microsecond? (1 mile=1.61 km)

A radio wave travels 186000 miles per second. 1 mile is equivalent to 1.61 km. 186000 miles is equivalent to 186000*1.61 = 299460 km.

The radio wave travels 299460 km per second. It travels 299460*10^-6 = 0.299460 km in one microsecond.

A radio wave travels 0.299460 km in one microsecond.

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.