Final answer:
Scientists made preparations such as calculations, equipment design, and safety protocols before the first nuclear test.
Step-by-step explanation:
Before the first nuclear test, scientists made several preparations to ensure the success and safety of the test. These preparations included extensive calculations and simulations to predict the effects of the explosion, designing and building the necessary equipment and instruments to measure and record data from the test, and establishing safety protocols to protect the personnel involved. For example, scientists calculated the critical mass of the nuclear material and designed the bomb accordingly to achieve a controlled chain reaction.
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