Concept Simulation 7.1 illustrates the physics principles in this problem. An astronaut in his space suit and with a propulsion unit(empty of its gas propellant) strapped to his back has a mass of 146 kg. The astronaut begins a space walk at rest, with a completelyfilled propulsion unit. During the space walk, the unit ejects some gas with a velocity of +32 m/s. As a result, the astronaut recoils witha velocity of -0.39 m/s. After the gas is ejected, the mass of the astronaut (now wearing a partially empty propulsion unit) is 165 kg.What percentage of the gas propellant was ejected from the completely filled propulsion unit?Percent depleted = Number iUnits

The percentage of the gas propellant was ejected from the completely filled propulsion unit

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Hello, can you also please include the formula that you used to solve this problem? Thank you!
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