【英语时差8,16】曼妥思和健怡可乐的爆炸反应

Mentos And Diet Coke–The Explosive Reaction Explained! 

 

Y:Hey,Don.Have you ever seen videos online of the huge geyser like explosions that happen when you drop Mentos candies into a bottle of diet cola? 

 

D:Yes,I have,Yeal.The cola explodes up like a fun up to 30 feets high. 

 

Y:The reaction happens when the rough surface of the candy causes bubbles to “seed” out of the liquid. The imperfections on the candy surface cause microscopic¹ bubbles of dissolved gas to gather together into bigger bubbles. These rise to the surface, eventually erupting out of the bottle opening. 

 

D:Why do they always use Mentos and diet cola? Wouldn’t any rough surface work with any fizzy drink? 

 

Y:Physicists studied that very question. They experimentally tested the reaction using different seeding objects, such as different candies, sand, rock salt and dish soap.They also tested different fizzy drinks, including regular, diet and caffeine free colas, and soda² water- measuring the height and volume of the resulting geysers for each combination.It turns out Mentos were the best seeders for the reaction. One reason is their large surface to volume ratio, which allows millions of bubbles to form from each piece. They are dense³ and sink quickly. As they sink the bubbles formed seed even more bubbles as they rise through the cola.Plus, the Mentos shell contains gum arabic, a surfactant. This allows bubbles to form more easily.Diet cola–with or without caffeine–produced the biggest reactions, because soda sweetened with aspartame has lower surface tension than sugary sodas⁴ or plain water. Lower surface tension contributes to rapid bubble formation. Warm cola also resulted in more dramatic explosions than cold. 

 

D:I'm definitely trying this at home! 

 

Y:Aha,better wear a rain jacket.

1 microscopic   

adj.微小的，细微的，极小的，显微的

参考例句：

• It's impossible to read his microscopic handwriting.不可能看清他那极小的书写字迹。
• A plant's lungs are the microscopic pores in its leaves.植物的肺就是其叶片上微细的气孔。

2 soda   

n.苏打水；汽水

参考例句：

• She doesn't enjoy drinking chocolate soda.她不喜欢喝巧克力汽水。
• I will freshen your drink with more soda and ice cubes.我给你的饮料重加一些苏打水和冰块。

3 dense   

a.密集的，稠密的，浓密的；密度大的

参考例句：

• The general ambushed his troops in the dense woods. 将军把部队埋伏在浓密的树林里。
• The path was completely covered by the dense foliage. 小路被树叶厚厚地盖了一层。

4 sodas   

n.苏打( soda的名词复数 )；碱；苏打水；汽水

参考例句：

• There are plenty of sodas in the refrigerator. 冰箱里有很多碳酸饮料。 来自辞典例句
• Two whisky and sodas, please. 请来两杯威士忌苏打。 来自辞典例句