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When a shell bursts while airborne, some of its chemical energy transforms into mechanical energy, leading to an increase in kinetic energy.

1. Chemical energy changes into mechanical energy.
2. Kinetic energy becomes greater.
3. The shell bursts while in the air.
4. The total energy stays unchanged.

Correct answer: Kinetic energy becomes greater.

Solution

When the shell explodes, its chemical energy is converted into mechanical energy, leading to an increase in kinetic energy. This aligns with the principle of energy conservation.

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