A monopropellant liquid rocket engine has 800 injectors of diameter 4 mm each,
and with a discharge coefficient of 0.65. The liquid propellant of density
1000 kg/m3 flows through the injectors. There is a pressure difference of 10 bar
across the injectors. The specific impulse of the rocket is 1500 m/s. The thrust
generated by the rocket is _____ kN (rounded off to one decimal place).
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2025 Q.63)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Air-Breathing & Rocket Propulsion** under *Propulsion* (2 Marks, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Air-Breathing & Rocket Propulsion equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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