MCQOPTIONS
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| 1. |
What happens when normal shock wave propagates into laboratory facility? |
| A. | Induces gas ahead of it |
| B. | Induces gas behind it |
| C. | Leaves a small area of vacuum behind it |
| D. | Leaves a small area of vacuum ahead of it |
| Answer» C. Leaves a small area of vacuum behind it | |