Question: Rockets used in the space program are generally multistage that is, they have stacked stages, each with its own engine and propellant. Starting with the

Rockets used in the space program are generally multistage— that is, they have stacked stages, each with its own engine and propellant. Starting with the bottom, the stages are jettisoned when they have run out of fuel. The first stage is usually the largest, the second stage above it is the next largest, and so on. What are the advantages of multistage rockets and stage sizes?

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