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Yes, the booster rockets. This usually happens after their fuel has been spent, and they merely drop back to earth and land in the ocean where they are retrieved and used again for another flight.
The speed of flight really depends on what you mean by 'flight'. The shuttle can reach over 1700 mph, but not all that is provided by the shuttle engines. The initial 3000 mph are supplied by the booster rockets.
The center of gravity affects the rockets flight by being gay.
Rockets in flight have kinetic energy. Rockets with remaining fuel have chemical energy. Rockets still able to fall back to Earth have potential energy.
Both liquid and solid fuel rockets are used for manned flight today.
3 G to allow crew to function in flight.
Challenger was destroyed in a launch accident on January 28, 1986.Columbia was destroyed during reentry on February 1, 2003.The surviving four shuttles are Enterprise (flight tests), Discovery, Atlantis, and Endeavour (built to replace Challenger).
Germany
The Starland Vocal Band in 'Afternoon Delight'.
As for "all of us here on Earth" people, rockets contribute a negligible increase in water vapor to their launch areas, and a statistically miniscule chance that part of one could someday fall on your house :-) As for those people skilled enough to fly in spacecraft, the major effects of rocket flight are twofold : 1) a short period of high-G (acceleration) stress during takeoffs and landings (not usually a cause of chronic injury) ; and 2) loss of muscle tone and bone calcium if working for long periods in weightless conditions in space (which is not actually an effect of the rocket itself).
Flight. Particularly space shuttles. For average people, jet or military planes.
There was no crew on Apollo 4. It was an unmanned test flight, and the first flight of the Saturn V booster rocket.