If an engineer’s greatest concern is specific impulse, which type of fuel should she use?
A. Gaseous fuel
B. Solid fuel
C. Combustible fuel
D. Liquid fuel
If an engineer’s greatest concern is specific impulse, which type of fuel should she use?
A. Gaseous fuel
B. Solid fuel
C. Combustible fuel
D. Liquid fuel
Answer: D. (Liquid fuel)