• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Instruction Manual/Experiments Guide
Instruction Manual/Experiments Guide

Chapter 17 - Aerostudents
Chapter 17 - Aerostudents

EXAMINATION OF THE STRUCTURE AND EVOLUTION OF ION ENERGY
EXAMINATION OF THE STRUCTURE AND EVOLUTION OF ION ENERGY

Problems and Solutions Manual
Problems and Solutions Manual

... 21. The total distance a lab cart travels during specified lengths of time is given in the following data table. ...
Review Problems for Introductory Physics 1
Review Problems for Introductory Physics 1

ROTATIONAL VECTORS AND ANGULAR MOMENTUM
ROTATIONAL VECTORS AND ANGULAR MOMENTUM

1000-Solved-Problems-in-Classical-Physics-An-Exercise
1000-Solved-Problems-in-Classical-Physics-An-Exercise

Vector Mechanics for Engineers ( Dynamics )
Vector Mechanics for Engineers ( Dynamics )

Table of Contents
Table of Contents

Physics Review
Physics Review

final exam - PHYSICS57
final exam - PHYSICS57

Chapter 10 Angular Momentum
Chapter 10 Angular Momentum

Document
Document

Introduction - Physics For Today
Introduction - Physics For Today

... All objects in free fall near the Earth’s surface accelerate down at 10 m/s2. 20. What is the velocity of an object, 5 seconds after it is dropped? 6 seconds? Ans. 50 m/s; 60 m/s 23. What relationship between distance traveled and time did Galileo discover for accelerating ...
Instructor Solutions Manual for Physics by Halliday, Resnick, and
Instructor Solutions Manual for Physics by Halliday, Resnick, and

Document
Document

Final Revision sheet with answers at the end
Final Revision sheet with answers at the end

NCFE Review
NCFE Review

MODELING OF IMPACT DYNAMICS OF A TENNIS BALL WITH A
MODELING OF IMPACT DYNAMICS OF A TENNIS BALL WITH A

Dynamics Extra Study Questions
Dynamics Extra Study Questions

Cutnell 9th problems ch 1 thru 10
Cutnell 9th problems ch 1 thru 10

Problem 14.1 In Active Example 14.1, suppose
Problem 14.1 In Active Example 14.1, suppose

... W = −j(9000)(9.81) = −88.29j (kN). From Newton’s second law, F − W = ma, from which F = W + ma = 32400i + 85050j (N). The component tangent to the path is T = F · et = 32400 cos β + 85050 sin β = 61669.4 (N) The component normal to the path is L = F · en = −32400 sin β + 85050 cos β = 66934 (N) ...
8.5 Collisions 8 Momentum
8.5 Collisions 8 Momentum

... The force or impulse that changes momentum must be exerted on the object by something outside the object. • Molecular forces within a basketball have no effect on the momentum of the basketball. • A push against the dashboard from inside does not affect the momentum of a car. These are internal forc ...
velocity of decameter electrojet irregularities under strongly driven
velocity of decameter electrojet irregularities under strongly driven

... Stokkseyri, Iclenad. The radar detects echoes from the irregularities and is thus capable of measuring their velocity. The DMSP satellites measure the plasma drifts in situ at heights of ~ 800 km, but these measurements can be projected onto E-region heights at high latitudes. By comparing the radar ...
Chapter 19 Angular Momentum
Chapter 19 Angular Momentum

1 2 3 4 5 ... 156 >

Specific impulse

Specific impulse (usually abbreviated Isp) is a measure of the efficiency of rocket and jet engines. By definition, it is the impulse delivered per unit of propellant consumed, and is dimensionally equivalent to the thrust generated per unit propellant flow rate. If mass (kilogram or slug) is used as the unit of propellant, then specific impulse has units of velocity. If weight (newton or pound) is used instead, then specific impulse has units of time (seconds). The conversion constant between these two versions is the standard gravitational acceleration constant (g0). The higher the specific impulse, the lower the propellant flow rate required for a given thrust, and in the case of a rocket, the less propellant needed for a given delta-v, per the Tsiolkovsky rocket equation.Specific impulse is a useful value to compare engines, much like miles per gallon or liters per 100 kilometers is used for cars. A propulsion method and system with a higher specific impulse is more propellant-efficient. While the unit of seconds can seem confusing to laypeople, it is fairly simple to understand as ""hover-time"": how long a rocket can ""hover"" before running out of fuel, given the weight of that propellant/fuel. Of course, the weight of the rocket has to be taken out of consideration and so does the reduction in fuel weight as it's expended; the basic idea is ""how long can any given amount of x hold itself up"". Obviously that must mean ""...against Earth's gravity"", which means nothing in non-Earth conditions; hence Isp being given in velocity when propellant is measured in mass rather than weight, and the question becomes ""how fast can any given amount of x accelerate itself?""Note that Isp describes efficiency in terms of amount of propellant, and does not include the engine, structure or power source. Higher Isp means less propellant needed to impart a given momentum. Some systems with very high Isp (cf. ion thrusters) may have relatively very heavy/massive power generators, and produce thrust over a long period; thus, while they are ""efficient"" in terms of propellant mass carried, they may actually be quite poor at delivering high thrust as compared to ""less efficient"" engine/propellant designs.Another number that measures the same thing, usually used for air breathing jet engines, is specific fuel consumption. Specific fuel consumption is inversely proportional to specific impulse and the effective exhaust velocity. The actual exhaust velocity is the average speed of the exhaust jet, which includes fuel combustion products, nitrogen, and argon, as it leaves air breathing engine. The effective exhaust velocity is the exhaust velocity that the combusted fuel and atmospheric oxygen only would need to produce the same thrust. The two are identical for an ideal rocket working in vacuum, but are radically different for an air-breathing jet engine that obtains extra thrust by accelerating the non-combustible components of the air. Specific impulse and effective exhaust velocity are proportional.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report