If a man traveled in a rocket using only todays best scientific abilites, how far could he get in said rocket?
157405
Ion drive engines can reach speeds of about 30,000 miles per hour.  If someone lived 80 years travelling at that speed they would travel 21,024,000,000 (about 226 times the distance to the Sun from Earth).
1176470
With free energy:\n\nYou could put water back in the deserts of Africa and they wouldn't have to worry about food.\nPeople wouldn't need to burn wood to stay warm.\nA space rocket could go anywhere, fuel is main thing limiting us from travel.\n\nThe reward beside a lot of money, would be eternal fame. You would be more remembered that other famous scientists because you would have to discover some property they didn't know which proved them wrong.
313099
Well, it's literally "rocket science."  Gravity is the worst problem, probably.  It takes a huge amount of rocket fuel to get even a small object into space, let alone people and all the things they have to carry with them. (Imagine how exhausting it would be climbing straight up a 50-mile-high cliff.  Now imagine doing it without anything to hold onto!)  So once you get something up there, there's not much fuel left to keep accelerating.  Every little ounce has to be counted and allowed for in order to get a rocket up into orbit.\n\nBesides, in space everything is relative.  Spaceships and probes actually travel quite fast -- thousands of miles an hour -- but the places we're going to are MILLIONS of miles away.  The Cassini probe to Jupiter traveled nearly two billion miles to get there!\n\nFuel is just one of many problems that have to be dealt with in space travel.  In space, there is NOTHING at all.  No food, no water, no electricity, no heat, no air, no gravity.  Compared to space, walking across the Sahara Desert would be a fun hike.\n\nThere are so many things that you might never think of.  For instance, when the very first astronauts went into space, nobody knew what would happen to their eyes.  It was possible that in zero gravity their eyeballs would lose shape, and they would be blind!  Luckily, that didn't happen, but at the time nobody knew for sure.  Because of that and many other dangers, astronauts are very brave people.
381192
Rocket Principles\nA consquence of Newton's laws of motion is that for any object, or collection of objects, forces which only involve those objects and nothing else ("internal forces") cannot shift the center of gravity. For example, an astronaut floating in a space suit cannot shift his position without involving something else, e. g. pushing against his spacecraft. The center of gravity--or "center of mass"--is a fixed point, which cannot be moved without outside help (turning around it, however, is possible).\n\nBy throwing a heavy tool in one direction, the astronaut could get moving in the opposite direction, though the common center of gravity of the two would always stay the same. Given a bottle of compressed oxygen, the same result follows from squirting out a blast of gas (a scene that appeared in an early science fiction film). A rocket does much the same, except that the cold gas is replaced by the much faster jet of glowing gas produced by the burning of suitable fuel. At present, rockets are the only means capable of achieving the altitude and velocity necessary to put a payload into orbit.\n\nA rocket engine is a machine that develops thrust by the rapid expulsion of matter. Most rockets today operate with either solid or liquid propellants. The word propellant does not mean simply fuel, as you might think; it means both fuel and oxidizer. The fuel is the chemical rockets burn but, for burning to take place, an oxidizer (oxygen) must be present. Jet engines draw oxygen into their engines from the surrounding air. Rockets do not have the luxury that jet planes have; they must carry oxygen with them into space, where there is no air.\n\nThere are a number of terms used to describe the power generated by a rocket. \n\n\nThrust is the force generated, measured in pounds or kilograms. Thrust generated by the first stage must be greater than the weight of the complete launch vehicle while standing on the launch pad in order to get it moving. Once moving upward, thrust must continue to be generated to accelerate the launch vehicle against the force of the Earth's gravity. To place a satellite into orbit around the Earth, thrust must continue until the minimum altitude and orbital velocity have been attained or the launch vehicle will fall back to the Earth. Minimum altitude is rarely desirable, therefore thrust must continue to be generated to gain additional orbital altitude.\n\nThe impulse, sometimes called total impulse, is the product of thrust and the effective firing duration. A shoulder fired rocket has an average thrust of 600 lbs and a firing duration of 0.2 seconds for an impulse of 120 lb-sec. The Saturn V rocket, used during the Apollo program, not only generated much more thrust but also for a much longer time. It had an impulse of 1.15 billion lb-sec.\n\nThe efficiency of a rocket engine is measured by its specific impulse (Isp). Specific impulse is defined as the thrust divided by the mass of propellant consumed per second. The result is expressed in seconds. The specific impulse can be thought of as the number of seconds that one pound of propellant will produce one pound of thrust. If thrust is expressed in pounds, a specific impulse of 300 seconds is considered good. Higher values are better. A rocket's mass ratio is defined as the total mass at lift-off divided by the mass remaining after all the propellant has been consumed. A high mass ratio means that more propellant is pushing less launch vehicle and payload mass, resulting in higher velocity. A high mass ratio is necessary to achieve the high velocities needed to put a payload into orbit.\n\nThere are three categories of chemical propellants for rocket engines: liquid propellant, solid propellant, and hybrid propellant. The propellant for a chemical rocket engine usually consists of a fuel and an oxidizer. Sometimes a catalyst is added to enhance the chemical reaction between the fuel and the oxidizer. Each catego
981946
It depends on how fast your spaceship can travel and the flight path that you use. The distance to travel 385,000 km \n\nThe first man made object that got to the moon was the Russian Luna 2. It impacted with the Moon and scattered Russian pennants on the Lunar surface. The flight duration was 33.5 hours\n\nThe Apollo missions were a bit slower because the spacecraft first had to reconfigure in earth orbit and then had to brake as they approached the moon. Flight duration to the moon just over 60 hours.\n\nAt this stage there are no spaceships, on earth, capable of getting a human to the moon. So if you start tomorrow with a huge budget you should get there in four or five years.
313161
about 186,000 miles per second.  With our present technology, it would take hundreds of thousands of years. At the speed of light, it would only take thousands of years.
945516
I'm not sure there is enough information in the question to answer it.  We need to know the altitude of the astronaut when he is accelerating.  The answer implies that the astronaut is at sea level (see the other answer, where the user adds 9.81, or the sea-level gravitational acceleration).  However, if the astronaut is in space, then the acceleration due to earth's gravity is reduced significantly.\n\nSo in showing your work, I'd recommend at least stating the assumption that the astronaut is at sea level.
146292
11.2 km/s with the following caveats:\n\n"Due to the atmosphere it is not useful and hardly possible to give an object near the surface of the Earth a speed of 11.2 km/s, as these speeds are too far in the hypersonic regime for most practical propulsion systems and would cause most objects to burn up due to atmospheric friction. For an actual escape orbit a spacecraft is first placed in low Earth orbit and then accelerated to the escape velocity at that altitude, which is a little less, ca. 10.9 km/s. The required extra velocity, however, is less because the spacecraft has already been accelerated to about 8 km/s."
1011585
One that would travel the spaceways, from planet to planet
1150073
That would sort of depend on what you land on, now wouldn't it? If you have a parachute you could jump from the top of the Petronas Towers in Malaysia and survive. I think the farthest a human has fallen accidentally and lived is under fifty feet, unless they just happened to fall into something soft like a snow drift.
971600
1. His scientists developed the modern rocket,  which was and is still used in space exploration.\n2. His scientists also developed the jet engine, without which modern flight would take much longer.\n3. He created a war so horrific that it forced Europe to realize war was the means of destruction only, and that to grow as a continent, they must learn to live in cooperative peace.  This is really the first time this concept has been brought to frution.\n\nOkay, enough devil's advocate for one day.
725163
Ok, first of all the jet would stop working once you left atmosphere - but ignoring that for a moment and assuming you were in a craft capable of going 500mph:-\n\nWell at about 2.7 billion miles away, approximately 616 years.\n\n\n\n**update** Phew, so pleased to see that someone else concurred (+/-) 1 year, I suddenly thought I might have been out by a factor of 10 :)
392981
Is the speed at which it travels.
16773
To add a little to the above, there are also some very good scientific reasons to be skeptical about the possibility of little green men doing flybys besides merely a lack of evidence.  Among these is the enormous distances that need to be covered, the time it would take to do so, and the energy it would take to do so.  \n\nAs far as we can determine, light speed is the absolute speed limit of the universe.  As a material object approaches light speed it gains mass in an asymptotic way.  The closer you get to light speed, the more mass you have, and the more energy it takes to accelerate you. Unless our intelligent brethren out there have discovered fantastic ways around these problems, which while possible is not generally thought very likely, they would have to have arisen right on our doorstep cosmically speaking to even hope to get here.  If they managed 50% of light speed, which would take an energy source more potent than any we have imagined, and they arose by miraculous chance at the next solar system over (Proxima Centauri, 4.2 light years away) it would still take them a decade to get here.
703424
This is a very basic question and you need to get extra help if you are having trouble solving this in your physics class.\n\nAcceleration is force / mass.  (from F = ma).\n\nThus, for the astronaut\n\n120 = 79(a)\na = ~1.52m^2/s\n\nAnd the satellite\n\na = 0.182\n\nNow they travel in opposite directions (BOTH of them move). So calculate how far the astronaut travels, how far the satellite travels, and add them. Simple kinematics:\n\np = 2a(t^2) + v(t)
703223
There is no oxygen in space, so you couldn't light a match. I bet if you could though, it would burn in a sphere.
407005
I'd say 17000-19000 miles per hour.\n\nIts at a inclined geo-stationary orbit probably.