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A large spacecraft has a mass of 125,000 kg. Its orbital maneuvering engines produce a thrust of 50 kN. The orbiter is in a 400 km circular earth orbit. A delta-v maneuver transfers the spacecraft to a coplanar 300 x 400 km elliptical orbit. Neglecting propellant loss and using elementary physics (linear impulse equals change in linear momentum, distance equals speed times time), estimate
(a) the time required for the Dv burn and
(b) the distance traveled by the spacecraft during the burn.
(c) Calculate the ratio of your answer for (b) to the circumference of the initial circular orbit.
(d) What percent of the initial mass was expelled as combustion products?
Why do government agencies publicly open sealed bid tenders and announce the identity and amount of the winning bidder?
Suppose two world leaders "Nikita" and "Margaret" are engaged in an arms race and face the decision whether or not to build a missile. The payoffs of Nikita and Margaret are as follows: If both build a missile, both receive the payoff -10. If both ..
profit = (quantity of output) x (price - average total cost), marginal revenue = (change in total revenue)/(quantity of output).
Determine the types of the equilibria for the system above. Use nullclines and the computer to paint the picture of the phase plane for this system.
What should be the best topic to write about for my microeconomics assignment which needs to be included at most 5 microeconomics concepts?
If the tax on a good is increased from $0.15 per unit to $0.60 per unit, the deadweight loss from the tax
4) Suppose the federal government were to levy a national property tax on all housing in the United States. Assume that all households are renters, are perfectly mobile, and have homogenous tastes.a) Assuming the money raised by the property tax is w..
Set up the general form of the LP model for the following word problem. A cash grain farmer in Central Iowa has 600 acres of cropland available on which she plans to grow corn and soybeans in the spring of 2011. She has made some budgets, which ta..
describe an industry that would meet the conditions of a perfectly competitive industry which areahere are many buyers
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 ..
Example of market failures. In each case, identify the type of market failure and explain why it compromises efficiency.
is stability in the general level of prices through time important? why or why not? should price stability be the goal
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