Abstract: In Rockets and Missiles combustion gas of an integral burning of a propellant flows along the duct of the propellant. If the nozzles attached to a rocket motor are removed‚ the pressure on the duct becomes equal to atmospheric pressure and no sonic velocity is attained at the rear end of the duct. Then no thrust generated by the combustion of the propellant. In nozzleless propulsion the mass burning rate of the propellant in the duct is increased and the flow reaches sonic velocity
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C1. A room in a house has a floor area of 120 ft2. Which of the following is most likely the approximate volume of the room? b. 30 m3 C2. When SI units are plugged into an equation‚ it is found that the units balance. Which of the following can we expect to be true for this equation? a. The equation will be dimensionally correct. C3. How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order
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Scientific question: How does the incline of a slope influence the acceleration of a cart when it travels down a wooden plank? Introduction: What is an incline plane? Commonly referred to as a ramp or a slope‚ an incline plane is an even surface that is titled at an angle. An object placed on the tilted surface will often slide down the surface‚ accelerating because of an unbalanced force. The rate at which an object travels down the slope is dependent upon how tilted the slope is; the greater
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-Multistage rockets * Propelled by the recoil pressure of the burning gases it emits as it burns fuel * Most modern‚ high performance rockets are multistage * Multiple rockets stacked on top of each other that detach separately * Reasons for staging are * To improve performance by eliminating dead weight during flight * A huge‚ empty fuel tank is merely dead weight so it is dropped off to reduce weight later in flight * Maintain acceleration by reducing
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Law of Acceleration (1907) by Henry Adams (1838-1918) Images are not arguments‚ rarely even lead to proof‚ but the mind craves them‚ and‚ of late more than ever‚ the keenest experimenters find twenty images better than one‚ especially if contradictory; since the human mind has already learned to deal in contradictions. The image needed here is that of a new center‚ or preponderating mass‚ artificially introduced on earth in the midst of a system of attractive forces that previously
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1 1 2 3 C Motion I 7 (a) From 1 January 2009 to 10 January 2009‚ the watch runs slower than the actual time by 9 minutes. Therefore‚ when the actual time is 2:00 pm on 10 January 2009‚ the time shown on the watch should be 1:51 pm on 10 January 2009. Practice 1.1 (p. 6) D (a) Possible percentage error 10 −6 = × 100% 24 × 3600 = 1.16 × 10 % 1 (b) = 1 000 000 days 10 −6 –9 It would take 1 000 000 days to be in error by 1 s. (b) Percentage error 9 = × 100% 9 × 24 × 60 = 6.94 × 10–2%
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121 9. EJECTION SEAT CAPABILITIES TO MEET AGILE AIRCRAFT REQUIREMENTS Larry Specker John Plaga Air Force Research Laboratory AFRL/HEPA 2800 Q Street‚ Bldg #824 Wright-Patterson AFB‚ OH 45433-7947‚ U.S.A. Vic Santi Aeronautical Systems Center ASC/ENFC 2530 Loop Road West Wright-Patterson AFB‚ OH 45433-5797‚ U.S.A. 9.1 BACKGROUND Current USAF seats provide safe aircrew escape up to about 425 Knots Equivalent AirSpeed (KEAS). The performance limit of US ejection seats is cited as 600
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.......................................................................... 3431 – 13 – Question 22 (5 marks) An astronaut on the Moon throws a stone from the top of a cliff. The stone hits the ground below 21.0 seconds later. The acceleration due to gravity on the moon is 1.6 ms–2. 150 m 300 m (a) Calculate the horizontal component of the stone’s initial velocity. Show your working. ..............................................................................................
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the ball‚ a javelin thrower‚ a discus thrower or a shot putter trying to throw their objects as far as they can (Sears‚ Zemansky and Young 54). In warfare‚ catapults and arrows in medieval times were the deadly weapons while today‚ guns‚ mortars‚ rockets and missiles have replaced those ancient weapons of war (“Field Artillery and Mortars”‚ “Ballistics”). However‚ the way to effectively use these weapons has not changed. They are to be launched into projectile motion to hit the target. The path followed
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Motion NCERT Chapter Questions and Answers and other Q & A Q1: An object has moved through a distance. Can it have zero displacement? If yes‚ support your answer with an example. Answer: Yes an object can have zero displacement even though it has moved through a distance. It happens when the object moves back to its original position i.e. final position coincides with the starting position. Example: Suppose an object travels from O to C and then comes back to original position O. Total
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