Rockets, and what to think about when building one.

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Across
  1. 4. German-American aerospace engineer and space architect, he was also a pioneer of rocket technology and space science in the United States.
  2. 6. A rough type of airflow that ends with "ent".
  3. 7. Rhymes with the word crust.
  4. 8. Astronauts spend a lot of time in these things.
  5. 13. Helps a rocket take off and rhymes with the word clusters.
  6. 14. When a rocket is launched it is going through a...
  7. 16. If you use the same force to push a truck and push a car, the car will have more acceleration than the truck, because the car has less mass, because of...
  8. 17. One of the most important things to consider when thinking about aerodynamic friction.
Down
  1. 1. A smooth kind of airflow that rhymes with examiner.
  2. 2. Where all weight of a body, or system may be considered to act.
  3. 3. If you slide a hockey puck on ice, eventually it will stop, because of friction on the ice, because of...
  4. 5. When you jump off a small rowing boat into water, you will push yourself forward towards the water, because of...
  5. 9. Where all the average location of the pressure variation is located.
  6. 10. The first person to make a successful liquid-fueled rocket.
  7. 11. My sister is a ....shopper.
  8. 12. Used to produce the reaction mass in a chemical reaction. and rhymes with repellent.
  9. 15. Rhymes with atrocity.