Which of the following is an example of a decomposition reaction?
HgO + Cl2-->HgCl + O2
Na + Br2 --> NaBr
KCIO3 --> KCI + O2
AgF + CaCl2 → AgCl + CaF2

The answer is option 3.

Explanation:

Decomposition reaction occurs when one or more molecules are produced. It can decompose itself without any help of other compound.

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

we need to know the time interval during which the force acts. impulse of force = momentum change