...are arguing with me that the speed of light is constant to all...in all inertial frames. Thus, the speed of light must be the same...lightsource moving at an inertial frame speed of 1 mph and an observer...towards it at an inertial frame speed of 1000 miles per second....> only moving at the same speed as the source placing it ... of emitter and absorber's speed. It depends on the eps ... Do you think the speed of sound in water changes when ...

In article <25da8913-20b0-4fa3-bf60-e9f6f8318c10@p25g2000hsf.googlegroups.com>, PD <TheDraperFamily@gmail.com> wrote: On Aug 13, 11:39

... path can we have maglev travelling faster than Sound? at 1-2 mach? Why is maglev so ...'s not as simple as you make it sound.... :>) Small problems to figure out: - The current...at all. They're not designed for high- speed trains. So have to lay out new runs. - Nagging issue of making turns at high speed without throwing passengers to the floor. Need ...up and drop off passengers, at an average speed of 60 mph between stops. Doing that ...

...also all that noise will not get out. As Sound needs a medium to travel. So ... will be moving in a Vaccum tunnel at speed of 2000 Km/ hr This is possible, ans ... Additionally, you could increase the temperature of the air and increase its speed of sound. The tunnel could be hot, and you could still exchange heat into ... the levitating coils decreased gradually as the train speeds up (otherwise it gets pushed into the top ...

...Since it is free in air. And have a fixed path can we have maglev travelling faster than Sound? at 1-2 mach? Sure, all you need is massive amounts of power to get above Mach 1... free [Vacuum]. So no air friction and also all that noise will not get out. As Sound needs a medium to travel. So the train will be moving in a Vaccum tunnel at speed of 2000 Km/ hr Bye Sanny What say you reply to "G=EMC^2 Glazier", or...

Sanny wrote: Since it is free in air. And have a fixed path can we have maglev travelling faster than Sound? at 1-2 mach? Maybe mach 1 but air resistance is a big issue.... In future I am looking for 2000 Kms long tracks with Maglev trains running at 2000 Km / hr. Just floating. ...and the other is acceleration and braking time. A route that permit super fast maglevs would have points quite separated. It would be ...

... no air friction and also all that noise will not get out. As Sound needs a medium to travel. So the train will be moving in a Vaccum tunnel at speed of 2000 Km/ hr This is possible, ans would reduce losses to ...-maglev-vacuum-tube-train/ Additionally, you could increase the temperature of the air and increase its speed of sound. The tunnel could be hot, and you could still exchange heat into it from the passenger ...

... of drag is due to frontal area and what due to skin drag at supersonic speeds for a longish train, say 400 feet long? How does the sonic boom spread for an object moving at ground level at super sonic speeds? Could the sonic boom be deflected upwards by low walls? Frontal area probably ... a good analogy. And for some really cool videos of a jet car breaking the sound barrier, go on YouTube and search under 'Thrust ssc'.

... field. Since it is free in air. And have a fixed path can we have maglev travelling faster than Sound? at 1-2 mach? Sure, all you need is massive amounts of power to get above Mach 1, aerodynamic design to... we create a tunnel air free [Vacuum]. So no air friction and also all that noise will not get out. As Sound needs a medium to travel. So the train will be moving in a Vaccum tunnel at speed of 2000 Km/ hr Bye Sanny

...we have maglev travelling faster than Sound? at 1-2 mach? Why is...goes up exponentially, not linearly, with speed. So to maintain transonic and supersonic speeds, the energy consumption is enormous, and even more so at...probably be the limiting factor on speeds of maglev trains. Not that they...due to skin drag at supersonic speeds for a longish train, say 400...at ground level at super sonic speeds? Could the sonic boom be deflected...