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Elena thought about the meniscus, the bubbles, the stubborn elegance of a number that refused to lie. “A metrologist,” she said. “I want to measure things so well that nobody ever has to guess again.”

“No,” Mateo groaned. “Professor Almeida has a laser eye. If it’s not perfect to the third decimal, he’ll know I rushed the meniscus reading.” densidad del alcohol

She carefully tilted the pycnometer, letting the bubbles escape one by one, then topped it off. She weighed it, did the math on a napkin, and slid it back. Elena thought about the meniscus, the bubbles, the