Compute the maximum thrust density, power density and specific impulse for a 3-grided ion engine, having...

Compute the maximum thrust density, power density and specific impulse for a 3-grided ion engine, having an acceleration voltage of 2000 V, and a voltage difference of 2500 V and a gap of 1.5 mm between the plasma and the first acceleration screens. Compute the propulsive parameters for the following propellants: xenon, argon, and molecular hydrogen.

Expert Solution

samet mamat answered 2 years ago

A solid motor has an average thrust of 67,000 N, a specific impulse of 285 sec,...

A solid motor has an average thrust of 67,000 N, a specific impulse of 285 sec, and a propellant mass fraction of 0.92. Calculate the total mass of the vehicle for a 42 sec burn time.

An insulated pump receives liquid engine oil (density ρ = 55 lbm/ft3 , specific heat c...

An insulated pump receives liquid engine oil (density ρ = 55 lbm/ft3 , specific heat c = 0.442 Btu/lbm-R) at 75 oF and 15 psia, and exhausts the oil at 3000 psia and 140 oF. The mass flow rate of the oil is 1.2 lbm/s. Determine the power required by the pump.

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Styrofoam has a density of 32kg/m^3. What is the maximum mass that can hang without sinking from a 70-cm diameter Styrofoam sphere in water? Assume the volume of the mass is negligible compared to that of the sphere. Express your answer to two significant figures and include the appropriate units.

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A spherical particle having a diameter of 9.3 x 10-3 inches and a specific gravity of 1.85 is placed on a horizontal screen. Air is blown through the screen vertically at a temperature of 20 oC and a pressure of l atm. Calculate the following: (a) Velocity required to just lift the particle. (b) Particle Reynolds number at the condition of part (a). (c) Drag force. (d) Drag coefficient CD. Given; Viscosity of air = 1.23 x I0 -5 lbm/ft.s...

Motor sizing decision must consider 3 factors; stall torque, no load speed and maximum power. With...

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Can someone give me 3 specific examples of when government expanded its power? 1. Between the...

Can someone give me 3 specific examples of when government expanded its power? 1. Between the Civil War’s conclusion and the New Deal (1865-1940) the perceived role of government, long viewed as strictly limited, began to change in response to growing economic complexity, matters of civil rights, and questions of national security. Choose three examples from this period that illustrate such expansions of governmental power, explain them, and then assess how well they balanced acting for the common good while...

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