Ummmmmmm......... im in 6th grade and i do not understand 1 bit of this, but i tried, sorry! :)
The crackling sound Is mainly to do with chemistry, The fireworks are filled with lead oxide, which turns into lead atoms as the firework explodes and heat up—— whistling sounds, the whistle is down to the tube being narrow one, thus rockets make a whistling noise
Using stoichiometry:
5.5 L of blood x (1000 mL/1L) x (15 g/100 mL) x (1 kg/1000 g) = 0.825 kg
One half-life: 5 grams
Two half-lives: 2.5 grams
