Bissoy.com
Doctors Medicines MCQs Q&A

For optimal rockets, what should be the value of specific impulse of initial stages compared to later stages?

For optimal rockets, what should be the value of specific impulse of initial stages compared to later stages? Correct Answer Low value

In order to achieve optimal staging it is important to have lower values of specific impulse for initial stages compared to the later stages. This is because the lower stages are designed to operate in Earth’s atmosphere thus requiring higher efficiency. We trade-off between the efficiency and specific impulse in order to get higher thrust for initial stages. For later stages, it operates in vaccum thus it has a higher specific impulse. This would result in a higher delta-v.

Related Questions

Which of the following statements are correct for rockets? 1. Unlike the turbo-jet aircraft, in rockets the flight velocity can exceed the jet velocity 2. In rockets gases having lower molecular weight increase the specific thrust 3. In rockets the gases are expanded in the nozzle up to the atmosphere pressure.
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: 1. Some cars are rockets. 2. All rockets are engines. Conclusions: I. Some engines are rockets. II. Some engines are cars.
In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements. Statement I: No bombs are mortar. Statement II: All rockets are bombs. Conclusion I: All mortar are rockets. Conclusion II: Some bombs are rockets.
Two statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: All thermometers are rockets. All equipment are thermometers. Conclusions: I. Some rockets are equipment. II. Some rockets are thermometers.
In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements. Statement I: No bombs are mortar Statement II: All rockets are bombs Conclusion I: All mortar are rockets Conclusion II: Some bombs are rockets
Match List I with List II List I List II (A) Greedy Best-First Search (I) Space complexity is O(d) where d = depth of the deepest optimal solution (B) A* (II) Incomplete even if the search space is finite. (C) Recursive Best-First Search (III) Optimal if optimal solution is reachable: otherwise, returns the best reachable optimal solution. (D) SMA* (IV) Computation and space complexity is too high.   Choose the correct answer from the options given below:
Fill the half-filled code snippet to get the following graph: impulse(1,, ‘red’); ____; impulse(1,, ‘blue’); impulse(1,, ‘yellow’); impulse(1,, ‘green’);
Choose the correct option after observing the given graph and the code snippet carefully. impulse(1,, ‘red’); hold on; impulse(1,, ‘blue’); impulse(1,, ‘yellow’); impulse(1,, ‘green’);
If the motor axial specific impulse of a given nozzle is 340s for propellant ‘A’ and its characteristic velocity is 1400 m/s, determine the specific impulse for the same nozzle using a propellant ‘B’ with a characteristic velocity of 980 m/s. Assume both propellants ‘A’ and ‘B’ have the same specific heat ratio.
P, Q and R invested in a business for 2.5 years, such that P’s initial investment was 60% more than Q’s initial investment, while R’s initial investment was 25% less than P’s initial investment. After 10 months, each of them invested 25% of their initial investment. What part of the total profit will P received after 2.5 years?