subject
Engineering, 08.04.2020 02:35 iidoqeii16ovh8tk

Rocket scientists are testing a new three-stage rocket for delivering small payloads to low-Earth orbit. It has these characteristics

• Ispstage 1 = 300 s

• Ispstage 2 = 350 s

• Ispstage 3 = 400 s

• Payload mass = 1500 kg

• Structure mass stage 1 = 10,000 kg

• Structure mass stages 2 and 3 = 7500 kg each

• Propellant mass stage 1 = 50,000 kg

• Propellant mass stage 2 = 40,000 kg

• Propellant mass stage 3 = 35,000 kg

a) What is the initial mass of the entire vehicle?

b) What is the final mass of stage 1?

c) What is the ΔV of stage 1?

d) What is the initial mass of stage 2?

e) What is the final mass of stage 2?

f) What is the ΔV of stage 2?

g) What is the initial mass of stage 3?

h) What is the final mass of stage 3?

i) What is the ΔV of stage 3?

j) What is the total ΔV of the booster?

ansver
Answers: 1

Another question on Engineering

question
Engineering, 03.07.2019 15:10
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Answers: 3
question
Engineering, 04.07.2019 18:10
Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.
Answers: 3
question
Engineering, 04.07.2019 18:10
Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.
Answers: 1
question
Engineering, 04.07.2019 18:10
Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables
Answers: 1
You know the right answer?
Rocket scientists are testing a new three-stage rocket for delivering small payloads to low-Earth or...
Questions
question
Mathematics, 28.06.2019 08:00