Speed of Light

Well now, here we go again. When you start talking about the properties of

things moving near the speed of light, now you have to start specifying WHO

is measuring them.

-- If two scientists together got ahold of a piece of an asteroid one day,

brought it to their lab, measured its mass and its volume, calculated its

density, and each of them wrote the number down in his notebook, AND THEN . . .

-- If one of them somehow went to space and landed on that same asteroid,

while the other scientist, still on Earth, watched the asteroid shoot through

space at some high speed, THEN . . .

-- The travelling scientist, sitting on the asteroid and shooting through space,

could dig up a lump of it, measure its mass and volume, calculate its density,

check the number against his notebook, and he would find that it was still the

same density as before. It had not changed since he and his colleague did the

same measurement together in ther lab.

-- The scientist who stayed home ... if he had some way to measure the mass

and volume of a lump of the asteroid as it whizzed past him at a high speed ...

would find that its density has increased. That's because once the asteroid

started moving, any lump of it would shrink in the direction of its motion, while

the mass of the lump would become larger. More mass, divided by less volume,

would show up as increased density.

-- If the two scientists could communicate, they would get into a terrible argument.

Their answers would be different, and they would BOTH be correct.

-- And it would not even depend on the speed of the asteroid. It would happen

at ANY speed ... it's just that the DIFFERENCE would become greater as the speed

increases.

If you understand this, then you haven't read it carefully enough. What it describes

can't be. But it is.

I'm so glad you asked.

I honestly don't see anything in that list of choices that comes

anywhere close to an adequate description.

It means that the water or liquid is safe to drink.

Depending on the exact content of trace minerals in the emerald,

its refractive index can be anywhere from 1.566 to 1.6 .

The corresponding range for the speed of light through it is 187,370

to 191,438 km per second. (rounded)

There are several different types of glass, and light has a somewhat different speed

in each of them.

On the average, the speed of light across all typical types of glass is in the neighborhood

of 2/3 its speed in vacuum, or around 200,000 km/sec .

The vector form of Newton's formula for the force of gravity . . .
F = G M1M2/R2
when massaged and manipulated with some geometry and some calculus, does.

No, it does not. Nothing could be accelerated past the speed of light. As it approached the speed of light its mass would become infinite thereby requiring infinite energy. There were some results with neutrinos suggesting travel at faster than light speed, but it turned out to be due to experimental error.

No.

No tachyon has ever been discovered, thus there is no real symbol 'reserved' for it (like a greek nu is usually used to denote a neutrino).

Physicists may attempt to develop models containing tachyons but they usually choose their own symbol for their own particular tachyon.

According to the Theories of Relativity, time is NOT independent of the reference frame.

Yes, it certainly would, if you threw it harder,

or dropped it from a higher altitude.

It would be 100,000,000 metres per second.

In three days, light travels 4.82843973 × 10^10 miles.

unknown

But since you've already postulated two items so far unobserved and unknown

to science ... a wormhole, and a person traveling through one ... the story is

completely in your control, and you might as well keep going and make up a

description of what happens to him.

It would depend on the size of the wormhole. One the diameter of a donut would do the traveler serious harm. One the size of a bus wouldn't.

The survivor would merely end up somewhere else.

Light travels at a speed of approximately 186,282 miles per second. In 17 minutes, light would travel approximately 62,687,700 miles.

Refractive Index= Speed of Light in Vaccum / Speed of Light in the material

No. At least, all available evidence seems to indicate that it is not possible to transfer matter, energy, or information faster than the speed of light.

The speed of light in a vacuum is 299 792 458 meters per second or 983,571,056.43045 feet per second or 186,282.397 miles per second or 670,616,629.2 miles per hour.

Gust- 1. A sudden, brief increase in the speed of the wind. It is of a more transient character than a squall and is followed by a lull or slackening in the wind speed. Generally, winds are least gusty over large water surfaces and most gusty over rough land and near high buildings. According to U.S. weather observing practice, gusts are reported when the peak wind speed reaches at least 16 knots and the variation in wind speed between the peaks and lulls is at least 9 knots. The duration of a gust is usually less than 20 s. 2. With respect to aircraft turbulence, a sharp change in wind speed relative to the aircraft; a sudden increase in airspeed due to fluctuations in the airflow, resulting in increased structural stresses upon the aircraft. 3. (Rare.) Same as cloudburst

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.

The index of refraction.

the fastest man has traveled would be about 8000 m/s(the speed of a space shuttle in orbit) the speed of light is roughly 300000000 m/s. which is roughly 1/37500 the speed of light or .00002666667% the speed of light

Speed Index is a system that is used by the American Quarter Horse Association to rate the performance of racehorses. Speed Index is calculated by averaging the fastest three winning times over the past three years.