subject
Engineering, 07.02.2021 08:10 jdvazquez18p7a7vs

7. The European Space Agency launched a probe called Rosetta in March 2004. In August 2014, Rosetta reached its destination: a comet called 67P/Churyumov-
Gerasimenko. Rosetta is the first spacecraft to rendezvous with a comet. It contained a
lander craft, called Philae.
The Rosetta has a launch mass on Earth of 3000 kilograms [kg] and the Philae
has a launch mass of 220 pound-mass (lb). In order to escape Earth's gravity,
the combined spacecraft must accelerate at a rate of 25,000 miles per hour
squared (mi/h²]. How much thrust, in units of newtons [N], must the engines
provide to reach this acceleration?

ansver
Answers: 1

Another question on Engineering

question
Engineering, 04.07.2019 18:10
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
question
Engineering, 04.07.2019 18:10
An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature
Answers: 2
question
Engineering, 04.07.2019 18:10
True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure
Answers: 2
question
Engineering, 04.07.2019 19:10
The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false
Answers: 2
You know the right answer?
7. The European Space Agency launched a probe called Rosetta in March 2004. In August 2014, Rosetta...
Questions
question
Mathematics, 13.11.2020 07:10
question
Geography, 13.11.2020 07:10