This link explains it very well.
http://www.physlink.com/education/AskExperts/ae221.cfm
The design of rockets has certainly changed over time. Rockets now are designed to be sleek and very efficient on fuel.
In Rockets.
When they are launched.
In jets, speed boats, rockets, some helicopters
No. Jet engines draw oxygen from the atmosphere to mix and burn with jet fuel, and cannot function in a vacuum. Rockets carry their own oxygen, and can travel in the vacuum of space.
Retro rockets .
Rocket fuel is very heavy and it would take more rocket fuel for the launch to carry the weight of the fuel for retro rockets.
The lunar module slowed down to land on the moon by firing its descent engine to counteract the pull of gravity and reduce its speed. This controlled burn allowed the module to descend gently and touch down safely on the lunar surface.
Yes. The space shuttle uses rockets in space to manuever.
i don't think they do but n64 does
Speed in science means vector (direction and velocity). Any force which lessens the vector can be considered negative speed. A spacecraft's retro rockets are a good example.
Rockets work better in space than in air. In space, rockets don't have to overcome the resistance caused by air, allowing them to achieve higher speeds and more efficient propulsion. In contrast, in the Earth's atmosphere, rockets have to fight against air resistance which hinders their performance.
Yes, both work by action/reaction. Model rockets are just much smaller, thus have much less fuel, so can't go near as high or as far.
Just like any other rocket. The main difference is that the nozzle(and the direction of thrust) of a retro rocket is aimed in the opposite direction when compared to the main direction of travel. That's where the retro part comes in.
it does not work
Galileo's law
Any thrift store will have a great selection of retro pieces to choose from and they'll of course be well-priced.