MCQOPTIONS
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| 1. |
Which one of the following values is nearer to the vacuum specific impulse of a rocket engine using liquid hydrogen and liquid oxygen as propellants? |
| A. | 49 sec |
| B. | 450 sec |
| C. | 6000 sec |
| D. | 40000 sec |
| Answer» C. 6000 sec | |