is there a differance between flying speed and land speed?
96458
Yes.  When you are flying, you are in a fluid (air) which have currents similar to streams.  When you fly into a head wind, your airspeed may be as though you were flying at 500 miles an hour but your actual speed as traced on the ground might only be 450 miles an hour.
1068169
The helicopter is moving with the Earth (and air, ...) as the Earth rotates on its axis.  Just because the helicopter is no longer physically connected with the Earth does not mean that it longer moves with the Earth since its momentum is conserved.\nIts momentum while still located on the surface of the spinning Earth was some initial value.  When the Helicopter lifts up off the ground, by the law of conservation of momentum, it still has that same value.  However, if you want to be very technical, now that it is at a farther distance away from the center of the Earth, it is traveling just a wee bit slower than it should be in order to stay perfectly above its original position on the ground.  However, this difference in its speed of so small, it is easily negligible and is soon overcome by frictional forces.
1043887
I have flown from Anchorage Alaska to Boston Mass a couple of times, and the flight time from one direction to the next does not change.  The earth is spinning, but so is the air that surrounds it.  If you are flying across the northern half of the country its faster to fly east because of the jet stream
344500
Yes the difference between the two are still the speed of light -- it's because at speed of light, or even just factions of the speed of light "normal" Neut on physics stops and only relativity theory explains what happens.  At speed of light time no longer move at the same rate, so the two object will not have same reference in time, and since speed is distance over time, the comparison make little sense to the normal perception of how things work.\n\nAn that ultimately explain why the difference between the two is not 1000 miles per hour.
962720
Lots of unnecessary complications here.\n\nAirspeed is the hypotenuse. 20.4 is the side opposite the angle we are looking for.\n\nThe heading, east of north, must be at angle sin^-1(20.4/241).\n\nSpeed relative to the ground is the third side of the triangle, and is \n\nsqrt(241^2 - 20.4^2)\n\nZidane has got the angles all wrong. The wind is from the east. We want to fly due north. That's where the right angle is. 241 is the hypotenuse of the triangle. The wind serves to make the ground speed less than 241, not greater.
675938
The speed that the reflection is moving at is near light speed (186,000 miles a second). The spot we see the reflected light coming from is different as the plane moves across the earth, regardless of how fast or slow the plane is moving.
145524
they go faster over a slop and bumpy things (from what i've heard) and they go slower on very flat and wet surfaces.\nhope i helped!:)
27497
depends where on the earth (by the lattitude because longitude does not matter) your actually talking about because different lattiude have different circumferances of the earth. For example on the north pole the speed iis nearly zero but on the equator the speed is about 1,038 miles per hour (1,670 kph).
19187
From style.org, who has put far more time into this than I could ever do:\n\n"Although a definitive answer would of course require further measurements, published species-wide averages of wing length and body mass, initial Strouhal estimates based on those averages and cross-species comparisons, the Lund wind tunnel study of birds flying at a range of speeds, and revised Strouhal numbers based on that study all lead me to estimate that the average cruising airspeed velocity of an unladen European Swallow is roughly 11 meters per second, or 24 miles an hour."\n\nAccording to the article, kinematic data for the African swallow species is hard to come by, so as of right now the velocity of an African swallow is unknown.
399954
SPEED=dy/dt=distance/time.its not exactly something you invent.it was an axiom,a basis of understanding.
453022
no, as the atmosphere actually moves with the spin and the aircraft moves within the atmosphere, however stratospheric winds ( winds in the level of the atmosphere that the aircraft travel in) do affect travel time, for example a flight from say UK to Singapore takes 13 hours, from Singapore to UK takes 11 hours (aproximate) , depending on headwind, or following wind.
1089970
Yes, sound travels faster downwind than upwind or with no wind. The speed of sound is constant relative to the medium it is traveling through. So if that speed is 1000 ft/sec, then in the downwind direction the speed is 1000 ft/sec + the wind speed. However the helpful effect this would have on calling to someone downwind from you might be canceled out by the extra noise the wind produces.
559273
Speed of light, dude. The other reaction is the speed of electricity, which is slower than the speed of light a lot! \n\nDo the math - your foot hits the object - less than a second later the impulse hits your brain and you stop stepping down. So to travel say 12 feet (you are six feet + tall, so six feet up and six feet down) it is one second. 1 second divided by 12 = .08 feet per second.\n\nNow take the speed of light, which is roughly 186,000 MILES a second, or 186,000 times 5280 (feet in a mile) which is 982,000,000 feet a second (982 MILLION feet a second). So, to travel the 12 feet would take 0.0000000001018329939 seconds - over 10,000,000 times faster (ten million times faster). \n\nHope that helps!
1151411
Objects of different mass do fall at the same speed, but air resistance hinders this fact.  For example, if you drop a bowling ball and a feather at the same time on the Earth, obviously the bowling ball falls faster. \n\nHowever, on the moon, when the astronauts dropped a feather and a bowling ball, they hit the ground at the same time. \n\nIt would seem that the bowling ball should fall faster since gravity is pulling on it with more force. But, with the more mass, comes more inertia, which meas it resists being pulled more than the feather. So, the feather is pulled less, but it resists less as well, so because of that, they will fall at the same time. The relationship between the force of pull and the object's inertial compensates exactly so that all objects fall at the same rate.
828903
The average flight speed is about 45 kilometers per hour. Which breaks down to abput 28 miles per hour.
532059
When planes fly west to east, they can often go into the jet stream, which can add 100 or more miles per hour to their speed.  When flying in the other direction, they must fight this wind.  At the very least, they can fly above or below it, which reduces its effect, but they still have a ground speed of less than planes flying the other direction that can use the jet stream's assist.\n\nIt's the difference between trying to row a boat upstream vs. downstream.
270859
Speed is relative, Earth itself is actualy traveling quite fast away from the center of the universe, but relative to Earth, beyond any doubt, LPA's (Linear Particle Accelerators) (not realy "made", more like harnessed to make other particles move very fast), You could possibly also argue a Hydrogen Fusion Bomb, (or maybe it's a Uranium Fission bomb?, I can't remember)... anyways, the nuclear reaction created "travels" very quickly for the first few fractions of a second. As for things that carry people, the space shuttle, and as for Land speed, I do belive the Thrust SSC (The brittish) was about 750-760mph (thats cookin' on land alright) and was set in the late nineties... the first time somone had ever exceeded supersonic speeds on land, however... there are rocket sleds (looks like a cart on rails) used by the US military for testing that can far exceed supersonic speeds, but are unmanned.\n\nJust read Kes's answer... very trippy, but very true.