There isn't really a maximum speed (except of course for the speed of light!) a human can survive. What would kill a human is the force generated by very fast acceleration (G force). I'm not sure of the maximum number of G's a human can withstand, but in a pressurized cockpit of say a fighter plane, a highly trained pilot might be able to get somewhere between 15-20 G's (15-20 times Earth's normal gravity), although once you get that high, the plane is going to have some trouble staying together as well.
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The fastest speed a human can travel and survive is considered to be around Mach 3.3 (approximately 2,500 mph or 4,000 km/h). Exceeding these speeds can lead to problems such as extreme heat, structural stress, and physiological challenges that can be fatal.
Electromagnetic waves travel the fastest, including visible light, radio waves, and X-rays. In a vacuum, all electromagnetic waves travel at the speed of light, which is approximately 299,792 kilometers per second.
there is no specific wave they all travel faster through water but scientifically speaking sesmic waves do i belive also The speed of sound depends on the medium in which it is transported. The speed of sound is slow in gases, like in air. The speed of sound is faster in liquids, like in water. The speed of sound is fastest in solids, like in metal.
In a vacuum, all light waves travel at the same speed, which is approximately 299,792 kilometers per second.
The speed of sound is fastest in solids because the molecules are closely packed together, allowing sound waves to travel quickly through the material.
All regions of the electromagnetic spectrum travel at the speed of light in a vacuum, which is approximately 299,792 kilometers per second. So, they all travel at the same speed, regardless of their wavelength or frequency.