Tuesday, July 10, 2007

meleepker









Space shuttle Discovery is set to take off on December 7 from the Kennedy Space Centre. The planned space shot, which follows successful July and September missions, will mark NASA’s first night shuttle launch since the 2003 Columbia accident.




here is a example of a water rocket that was searched from a page called www.seeds2lrn.com/rocketsoftware.html
this website above helps student and rocketeers to understand the physics of water rockets and optimized their water rocket launch to their highest apogee.





The pace of technological progress in solid propellants—and explosives in general—was extremely slow. It was not until the middle of the 20th century that solid propellants for rockets made a sudden and dramatic leap forward.



in the early centuries rockets were rather small, and their use was confined principally to weaponry, and fireworks displays.





Around the 1720, A dutch professor built vehicle propelled by jets of steam.

A water rocket is a type of model rocket using water as its reaction. The pressure vessel the engine of the rocket is usually a used plastic soft drinks bottle. The water is forced out by a pressurized gas, typically compressed air.

Rockets are used for and weaponry, as launch vessle for artificial satellite, and for human spaceflight and exploration of other planets. While they are inefficient for low speed use, they are, compared to other propulsion systems, very lightweight.

in modern times people mostly use rocket for exploring space and firework.



Newton's first law of motion: an object at rest will remain at rest and an object In motion will remain in motion at constant velocity unless acted upon by an unbalance force.

Newton's second law of motion: Force = mass x acceleration.

Newton's third law of motion for every action there is an equal and opposite reaction. Newton's three laws of motion is apply to my rocket because when the rocket accelerate mass is created then the motion of the rocket will remain in motion until acted upon by an unbalance force.



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