Space shuttle astronauts in orbit do not hit their heads on the ceiling because they are in a state of free fall, experiencing microgravity. In this condition, both the astronauts and the shuttle are falling towards Earth at the same rate, creating the sensation of weightlessness. As a result, they float inside the shuttle and are not subject to the forces that would normally cause them to collide with surfaces.
Astronauts inside a falling shuttle experience weightlessness because they are in a state of free fall alongside the shuttle. This means both the astronauts and the shuttle are falling together at the same rate, so there is no sensation of hitting the ceiling despite the lack of gravity.
The interior of a space shuttle consists of various sections, including the flight deck where astronauts pilot the shuttle, the mid-deck where crew can eat and sleep, and the payload bay where experiments and satellites are stored. The space shuttle is a complex spacecraft with multiple compartments designed to accommodate astronauts and carry out missions in space.
As we explained in two earlier questions about max q, or maximum dynamic pressure, the Shuttle reaches a point about one minute after launch when the pressure force of the atmosphere rushing past the rapidly accelerating rocket reaches a peak. The roll maneuver is performed shortly before max q is reached because this "heads-down" orientation helps alleviate the stresses that the dynamic pressure loads cause on the vehicle's structure. The second factor we need to consider is that for each mission, the Shuttle must launch at a certain azimuth angle in order to be inserted into the correct orbital plane. Since the launch pad (and therefore the Shuttle) sits in a fixed position, the Shuttle must perform a roll maneuver during ascent in order to orient itself to achieve the desired launch azimuth angle. If it were possible to rotate the launch pad prior to launch, the pad could simply be rotated to accomodate the launch azimuth angle, and the Shuttle could launch into a heads-down orientation while gradually pitching over during ascent. Finally, the Shuttle orbits such that its cargo bay faces towards the Earth. The heads-down position assists in communications with the ground and allows instruments within the cargo bay to be pointed back towards Earth, which is required for many of the experiments carried within the bay. There is probably also some psychological benefit to the crew since they are given spectacular views of home rather than staring into the cold darkness of the great void of space.- answer by Aaron Brown, 8 June 2003 The above answer was found on the internet using google on September 25, 2008, by Eduardo Linares Batres elinaresbatres@gmail.com
They are called characatures
There are many reasons that the Space Shuttle performs a roll and pitch maneuver shortly after liftoff. The first is azimuth, or heading. When the crawler leaves the Shuttle on the Mobile Launch Platform at the pad, the cargo bay is facing roughly southwest. This is the most direct path from the Vehicle Assembly Building to the launch pad. For the cargo bay to face east, the crawler would have to execute a 180-degree turn, either spinning in place (not so safe for the Shuttle stack, and destructive to the crawlerway) or making a large loop near the pad (excess infrastructure). Long story short, the easiest way to spin the Shuttle is while it's flying, so the roll gets it pointed in the right direction, headed toward the correct orbital inclination, whether Hubble or ISS. The reason it's also called a pitch maneuver is because on the ground, the external tank is pointed vertically, but since the majority of the thrust in a rocket ascent to Low Earth Orbit must be oriented horizontally, the vehicle must be pitched over. The initial pitch maneuver, achieved through thrust vectoring via engine nozzle gimballing (primarily the SRBs, since at their distance from the center of gravity and with their superior thrust, they have greater control authority), puts the vehicle on course for a gravity turn maneuver that transitions it slowly from vertical to horizontal during ascent. The roll maneuver could be much shorter if the Shuttle flew with the Orbiter on top of the tank. So why does it roll nearly 180 degrees? First, because the angle of the Space Shuttle Main Engines relative to the vertical axis of the vehicle. Though their thrust vector is aimed at the center of gravity of the entire stack, the changing mass distribution due to the draining of the external tank makes them better suited to assisting the gravity turn if placed beneath the ET. Second, radio frequency communication between the antennas on the Shuttle and the ground is better when the signals do not have to pass through the external tank, as they would if the Shuttle were on top. Third, a heads down position allows the Shuttle to fly at a slight angle of attack, meaning the tip of the external tank plows ahead through the atmosphere as the vehicle passes through supersonic and hypersonic speeds, leaving the fragile Orbiter wings and tiles in its supersonic shadow, away from the strong aerodynamic forces that might otherwise damage it. Not to mention it's more fun for the astronauts to be able to look out the windows as the (upside-down) Earth during ascent, rather than the slow transition from blue sky (during day launches) to black space. As an interesting note, the Shuttle rolls back to Orbiter-on-top about five and half minutes into the roughly eight-minute ascent to prepare for ET separation. Naturally, the External Tank should fall toward the ground rather than being jettisoned higher into space. The "delta Z" maneuver at ET separation puts distance between the Orbiter and the ET, and the exhaust plume helps push the ET toward earth and cause it to tumble so that it mostly burns up in the atmosphere before plunging into the Indian Ocean. Then, finally, one more roll maneuver puts the Orbiter back into a heads-down position so the astronauts can look out the overhead windows and watch the world go by (and also so the communication antennas are once again facing the surface of the planet).
Astronauts inside a falling shuttle experience weightlessness because they are in a state of free fall alongside the shuttle. This means both the astronauts and the shuttle are falling together at the same rate, so there is no sensation of hitting the ceiling despite the lack of gravity.
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to keep from falling asleep
An astel is an arch or ceiling of boards placed above the workers' heads in a mine.
He was commisioned to do so by the heads of the Sistine Chapel
in the Hercules film, he stops and sears at the hydra after he cuts off some heads and i saw the hydra had 27 heads and also had 29 heads when Hercules is falling into the hydra
To find the ceiling joists in your home, you can use a stud finder or tap the ceiling with a hammer to listen for a solid sound, indicating the presence of a joist. You can also look for nail heads or screws that may be securing the drywall to the joists.
When Percy heads home with his mother and decides to live at camp half blood
The interior of a space shuttle consists of various sections, including the flight deck where astronauts pilot the shuttle, the mid-deck where crew can eat and sleep, and the payload bay where experiments and satellites are stored. The space shuttle is a complex spacecraft with multiple compartments designed to accommodate astronauts and carry out missions in space.
I have never heard of pigeon's heads falling off when they die. I don't think they do. Recently a Danish Scientist concluded that this in fact was a myth and that Pigeons heads only fall off in the southern hemisphere.
To find a stud in the ceiling, you can use a stud finder tool. Move the stud finder along the ceiling until it indicates the presence of a stud. You can also look for visual clues like nail heads or use a small drill to make a pilot hole to confirm the stud's location.
Since hot air is lighter than cool air, heat, especially the high heat from a fire, moves up to the fire sprinkler heads on the ceiling the ceiling rapidly. When the heat gets too great, heat sensitive bulbs contained in the sprinkler heads burst and release pressurized water from behind the bulbs.