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|  __ \\  | || | ||  | |/ //   / _ \\   /_   _// 
| |  \ || | || | ||  | ' //   | / \ ||  `-| |,-  
| |__/ || | \\_/ ||  | . \\   | \_/ ||    | ||   
|_____//   \____//   |_|\_\\   \___//     |_||   
 -----`     `---`    `-` --`   `---`      `-`'

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Text this: On the coalescence speed of bubbles