Final answer:
The statement that fireworks shows end with a loud and flashy finale is true, with the final act featuring the most extravagant effects, designed to be memorable. These shows follow a uniform time distribution for launching fireworks and the finale's design relies on principles of physics such as conservation of momentum.
Step-by-step explanation:
At the end of the fireworks, there is often a very loud and flashy finale. This statement is true. Fireworks shows are designed to delight the audience and leave a lasting impression with a grand finale that often features the largest and most elaborate effects. The time between fireworks is typically between one and five seconds, which allows for anticipation and maintains a uniform rhythm throughout the display. The grand finale usually includes a rapid-fire succession of multiple fireworks that create a spectacular and unforgettable end to the show. The brilliant colors of fireworks are the result of energy bursts given off by atoms, and these bursts are due to the various energy levels of atoms within the fireworks compositions. During a fireworks display, the conservation of momentum and the center of mass principles are important for understanding the elegant scattering of glowing fragments in all directions upon explosion.