What is the nominal tank pressure of a nitrous oxide hybrid motor at 24°C?

The nominal tank pressure of a nitrous oxide hybrid motor at 24°C is indeed 4971 kPa (721 psi). This value reflects the physical properties of nitrous oxide as a propellant.

At this temperature, nitrous oxide behaves like a gas under pressure, and its vapor pressure must be sufficient to ensure that it remains in a gaseous state within the tank. The figure of 4971 kPa corresponds to the necessary pressure to achieve proper flow and combustion characteristics in the hybrid motor. Understanding the concept of vapor pressure is essential for anyone dealing with hybrid rocket motors, as it influences both the performance and safety of the rocket.

The other options present pressures that are either too low or too high for the effective functioning of a nitrous oxide hybrid motor under these temperature conditions. This helps in grasping critical aspects of propulsion systems and the significance of accurate pressure readings in rocket science.