What is an essential property of a propellant?
820617
Here are some essential properties of a propellant:  It must deflagrate (burn very rapidly), but not detonate (instantly decompose).  It must produce a great volume of gas, compared to its uncombusted volume.  It must be stable enough to be handled safely prior to its ignition.
783897
All substances have properties that we can use to identify them. For example we can idenify a person by their face, their voice, height, finger prints, DNA etc.. The more of these properties that we can identify, the better we know the person. In a similar way matter has properties - and there are many of them. There are two basic types of properties that we can associate with matter. These properties are called Physical properties and Chemical properties:\n\nPhysical properties: Properties that do not change the chemical nature of matter \nChemical properties: Properties that do change tha chemical nature of matter\n\nExamples of physical properties are: color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction (paramagnetic) or repulsion (diamagnetic) to magnets, opacity, viscosity and density. There are many more examples. Note that measuring each of these properties will not alter the basic nature of the substance.\n\nExamples of chemical properties are: heat of combustion, reactivity with water, PH, and electromotive force.\n\nThe more properties we can identify for a substance, the better we know the nature of that substance. These properties can then help us model the substance and thus understand how this substance will behave under various conditions.
124349
The mass of any substance depends on how much you have of it, it is not a fixed amount.\nYou may be thinking of density perhaps?  The density of a substance is equal to its mass divided by its volume (D=m/v), density is the same for a given substance no matter how much you have.\nIf by chance you are talking about density, probably the most important liquid to know would be water with a density of 1 g/mL at room temperature.
225634
None. They are two different compounds.\n\nIt looks like you want to compare a specific property of the alcohols. Please specify!
583132
It shouldn't have anything significant.  Propylene glycol (1,2-propanediol) has no pi-bonds, so there wouldn't be any UV-absorbing electron structure.\n\nHO-CH2-CHOH-CH3
759887
Here's the best site I have found for calculating the velocity of the spud:\nhttp://ffden-2.phys.uaf.edu/211.fall2000.web.projects/J.%20Jones%20and%20T.%20Kenny/Projectile.htm\n\nThis is for a combustible firing chamber.  The pneumatic guns are more predictable and reliable since the pressure can be set prior to firing.  Where the combustible require calculating the air to fuel mixture based on the size of the firing chamber.  This is explained on another part of the site referenced above.\n\nThe best choice for this type of gun seems to the the solenoid valves that are common on sprinkler systems.\n\nThey also recommend that the barrel resistance be measured using a simple fish scale to find the force of resistance of the spud against the barrel.\n\nI also looked at a rifled barrel that provides better accuracy.\n\nMost spud gunners use parametric measurements to find the range of their cannon.  This is done using inclimeters for altitude and pressure gages to measure the max pressure in the firing chamber, while increasing the amount of fuel or air pressure and taking a series of measurements to find the characteristics of the cannon.\n\nenjoy\n\nj
39571
As you know, Newton's Third Law of Motion states that for every action there is always an equal and opposite reaction. This is applicable only to an action originating from a mass. When you consider a rocket, gas is ejected out from the thrust nozzle with great acceleration. This is achieved when a force is applied on the gas.\nNow, when a force is applied on the gas by the rocket to thrust it out, the gas exerts an equal and opposite force on the rocket, thereby resulting in acceleration of the rocket in the direction of the net resultant force. Thus there is no need for any atmosphere or body which exerts a reaction force other than the gas ejected!! So there you are !!!
948757
The concentrations of all the components: the reactants, the products, the catalyst.\nYou will also need the temperature.\nIf it's a gas-phase reaction, the pressure..\nIf it's a solid-liquid reaction, the surface area; or if the catalyst is a solid, the surface area of the catalyst.
647302
Thrust is the reactive force that is exerted by a rocket, propellar, or jet engine, which propels a craft.
843106
Liquid hydrogen (fuel) and liquid oxygen (oxidizer) are used in many applications for rockets. The one that comes to mind is the Centaur upper stage on Atlas-Centaur and Titan-Centaur expendable launch vehicles launced by NASA.\n\nThe fuel and oxidizer, which are gases at normal atmospheric pressure, are compressed to liquids under high pressure and low temperatures.
100734
There are a variety of sources. If it's a physical constant, I'd suggest the CRC Handbook of Chemistry and Physics or Langer's Book of Chemistry. You might also try the chemical literature through scifinder, if you are at a university that has a subscription.
862924
Remember the defintions of "chemical" and "physical" properties!\n\nPhysical are those that can be experienced by the senses (sight, smell, taste, hearing, touch). Chemical are those in which the chemical reaction creates a new material; however, it has become accepted practice to use "chemical property" to define a material's behavior at a set of known conditions (temperature, humidty, pressure, etc). \n\nThe site given lists just about everything you'd want to know about Nitrogen; from it, you should be able to answer some of the basic "physical" characteristics and pull what you need for the chemical ones.\n\nLike I've answered before - since the definition of "chemical" has evolved over the years, you need to decide for yourself which ones best answer your query.
361256
The liquid oxygen goes in the smaller, top tank inside the external tank.  To provide better stability in rockets, one should always put the densest (and heaviest) fuel at the top.\n\nThe propellant mixture in each SRB motor consists of an ammonium perchlorate (oxidizer, 69.6 % by weight), aluminum (fuel, 16 %), iron oxide (a catalyst, 0.4 %), a polymer (such as PBAN or HTPB - a binder that holds the mixture together, 12.04 %), and an epoxy curing agent (1.96 %).
439425
You need to give more info, like fuel capacity, weight of rocket, length of fueled burst.
57815
BE VERY CAREFUL, then you can follow the instructions on the website: http://chemistry.about.com/cs/howtos/ht/gunpowder.htm\n\nDon't get into any trouble!
269664
One of the basic principles of physics (Newton's Third Law) is that for every action (force) there is an opposite and equal reaction (force). The principle of a rocket motor may be understood by considering the example of a closed container filled with a compressed gas. Within this container the gas exerts equal pressure on every point of its walls. If a hole is punched in the bottom of the container, however, the gas at the bottom escapes and the pressure against the top of the container is no longer equalized. The internal gas pressure then pushes the container upwards in reaction to the jet of air escaping downwards. The amount of thrust developed by a rocket motor depends mainly on two factors, the velocity with which the burning gases leave the combustion chamber, and the mass of the burning gases.\n\nThis website for answer confirmation and more info --> http://uk.encarta.msn.com/encyclopedia_7...\n\nGod is spelled B-I-G B-A-N-G\nPBrax@netscape.com
531431
Liquid oxygen is a powerful oxidising agent: organic materials will burn rapidly and energetically in liquid oxygen, hence LOx is a common liquid oxidizer propellant for spacecraft rocket applications usually in combination with liquid hydrogen or kerosene. It was used in the very first rocket applications like the V2 missile and Redstone, R-7 Semyorka or Atlas boosters.