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With the talk of scale wieght...


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What if you had a car that was going faster than the speed of light... and you turned the headlights on.

Would they go on??? :P

HAHA! Your a good sport Harry! I just had the whole family involved in a conversation over this question. Now if a car is traveling at light speed and your in it, and you turn the lights on, they would be on but wouldn't project. If you turn the lights on at a stand still and then go light speed you would have a projection. If your standing still and a car traveling at light speed is coming at you, your not going to see the light or the car.

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What if you had a car that was going faster than the speed of light... and you turned the headlights on.

Would they go on??? :P

Even in 1/25, you CAN'T go faster than the speed of light, so headlights would always work .. though the field of view may shrink.

Then again, quantum mechanics may prove that wrong. :o

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  • 3 weeks later...

What if you had a car that was going faster than the speed of light... and you turned the headlights on.

Would they go on??? :P

No. As one approaches the speed of light, time begins to slow down. It is theorized that at the speed of light, in addition to other problems, time as we know it, is essentially stopped. Therefore, once you attain the speed of light, you may be able to, from your vantage point, turn on the headlights, but as far as the rest of the universe is concerned, for you, time has stopped so assuming we could see you, nothing would appear to happen. What would you see when you turned on your headlights? Nobody really knows, but it is believed that things may seem quite normal until you come to a stop and find that millions or billions of years had passed during your trip.

David G.

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My opinion of time is scale does not matter, it's constant. However, the model railroad guys who run their layouts like real trains have special clocks that are sped up. So, therefore they are scaling time.

Apparently, that's because they can't realistically scale train route distances; they'd probably need a layout the size of an airport runway. They're just trying to alter their perceptions of the time it takes to get from point A to point B. This can also be accomplished through the use of illegal substances.

Model train layout fast clocks:

http://www.layoutvision.com/id27.html

Edited by sjordan2
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OK. I think my point got lost. Lets say you have a diorama. Take and put it on a automatic turn table with a set speed of how fast the earth is turning scaled down to 1/25. Wouldn't you get a few revolutions before a 1:1 day is out? I'm thinking there's twelve months in a year for us. So if you take 25 out of 1/25 and divide it by twelve you get a little over two years in scale to our one year. Does that sound about right? I'm thinking in terms of dog years.

Now your talking perspectives, A dogs 7 years, is just a perspective to our one. They seem to age 7 times faster then us if you think they "should" live as long as the average human. A "little" person dosent age twice as fast as someone over 6" tall do they?

But if your models seem to be aging a little to fast bill, try a little mothers wax...works wonders :)

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I will leave it to Dr. Pamp to elucidate this thought, but it seems to me that, even if you strip away all of the Earth down to 1/25, or even to the size of a ball bearing at the center of the Earth's axis, it's still going to rotate at the same rate it does now. Therefore, 1 day = 1 day, and time doesn't change. For example, the hub of a bicycle wheel rotates at the same rate as the tires.

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I will leave it to Dr. Pamp to elucidate this thought, but it seems to me that, even if you strip away all of the Earth down to 1/25, or even to the size of a ball bearing at the center of the Earth's axis, it's still going to rotate at the same rate it does now. Therefore, 1 day = 1 day, and time doesn't change. For example, the hub of a bicycle wheel rotates at the same rate as the tires.

The further out you go from the center, the more distance you travel. The hub of a bike wheel rotates at the same speed as the outer rim (same rpm), but during each revolution the air valve travels a much greater distance (the circumference of the wheel) than any given spot on the hub, even though both are rotating at the same speed (rpm).

So if you could scale yourself down to the size of a bug and sit on the rotating wheel, you'd get a much greater sense of speed as if you sat on the rotating hub, even though both the hub and the wheel rim are rotating at the same rate.

Whoa... I'm getting a headache... :lol:

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The further out you go from the center, the more distance you travel. The hub of a bike wheel rotates at the same speed as the outer rim (same rpm), but during each revolution the air valve travels a much greater distance (the circumference of the wheel) than any given spot on the hub, even though both are rotating at the same speed (rpm).

So if you could scale yourself down to the size of a bug and sit on the rotating wheel, you'd get a much greater sense of speed as if you sat on the rotating hub, even though both the hub and the wheel rim are rotating at the same rate.

Whoa... I'm getting a headache... :lol:

Uhhh...what you said. The speed picks up at the outer edges that have to cover greater distances in the same time as the rotation of the smaller hub. But they're going at the same rpm, and that doesn't make the time of day go faster.

Edited by sjordan2
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The further out you go from the center, the more distance you travel. The hub of a bike wheel rotates at the same speed as the outer rim (same rpm), but during each revolution the air valve travels a much greater distance (the circumference of the wheel) than any given spot on the hub, even though both are rotating at the same speed (rpm).

So if you could scale yourself down to the size of a bug and sit on the rotating wheel, you'd get a much greater sense of speed as if you sat on the rotating hub, even though both the hub and the wheel rim are rotating at the same rate.

Whoa... I'm getting a headache... :lol:

Let's say there are two bugs on the hub. One decides to venture out to the rim, the other one stays on the hub. When the bug returnes from his journey to the rim back to the hub, a shorter period of time will have passed for him, than for the bug that stayed behind.

At least that's what Dr. Einstein claims.

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Two trains, 200 km apart, are moving toward each other at the speed of 50 km/hour each. A fly takes off from one train flying straight toward the other at the speed of 75 km/hour. Having reached the other train, the fly bounces off it and flies back to the first train. The fly repeats the trip until the trains collide and the bug is squashed.

What distance has the fly traveled until its death?

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Two trains, 200 km apart, are moving toward each other at the speed of 50 km/hour each. A fly takes off from one train flying straight toward the other at the speed of 75 km/hour. Having reached the other train, the fly bounces off it and flies back to the first train. The fly repeats the trip until the trains collide and the bug is squashed.

What distance has the fly traveled until its death?

What scale were the trains ??

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What scale were the trains ??

Doesn't matter. But Christian's parable about the bug on the outside spending less time in his ordeal on the rim than the bug on the inside means only that the outside bug left early, stopped at a pub, then went to the hub.

Edited by sjordan2
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So back to the bugs...

One bug is sitting on the hub of the wheel and another bug is sitting on the rim. The hub and rim (the entire wheel and all of its parts) are rotating at the same rpm. But in the course of one wheel revolution, the distance traveled by the bug on the hub is the circumference of the hub, while the distance traveled by the bug on the rim is much longer-the circumference of the rim is much larger than the circumference of the hub. In one wheel revolution the bug on the rim has traveled a much longer distance than the bug on the hub, yet they were both rotating around the wheel's axle at the same speed (the speed of the rotating wheel).

How can that be?

Does time change relative to the distance from the axis of rotation? Does time go by faster on Pluto than on Mercury?

Is time not a constant? Does time depend on where you are?

If the bug on the hub and the bug on the rim have both completed one revolution of the wheel in the same amount of time, how is it possible that the bug on the rim traveled a much longer distance in the same amount of time?

Now I really have a headache! :lol:

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So back to the bugs...

One bug is sitting on the hub of the wheel and another bug is sitting on the rim. The hub and rim (the entire wheel and all of its parts) are rotating at the same rpm. But in the course of one wheel revolution, the distance traveled by the bug on the hub is the circumference of the hub, while the distance traveled by the bug on the rim is much longer-the circumference of the rim is much larger than the circumference of the hub. In one wheel revolution the bug on the rim has traveled a much longer distance than the bug on the hub, yet they were both rotating at the same speed (the speed of the rotating wheel).

How can that be?

If the bug on the hub and the bug on the rim have both completed one revolution of the wheel in the same amount of time, how is it possilble that the bug on the rim traveled a much longer distance in the same amount of time?

Same time frame, one was going at a faster rate of speed in that time frame then the other

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So back to the bugs...

One bug is sitting on the hub of the wheel and another bug is sitting on the rim. The hub and rim (the entire wheel and all of its parts) are rotating at the same rpm. But in the course of one wheel revolution, the distance traveled by the bug on the hub is the circumference of the hub, while the distance traveled by the bug on the rim is much longer-the circumference of the rim is much larger than the circumference of the hub. In one wheel revolution the bug on the rim has traveled a much longer distance than the bug on the hub, yet they were both rotating around the wheel's axle at the same speed (the speed of the rotating wheel).

How can that be?

Does time change relative to the distance from the axis of rotation? Does time go by faster on Pluto than on Mercury?

Is time not a constant? Does time depend on where you are?

If the bug on the hub and the bug on the rim have both completed one revolution of the wheel in the same amount of time, how is it possible that the bug on the rim traveled a much longer distance in the same amount of time?

Now I really have a headache! :lol:

Wheel circumference of the hub:

_____________________

Wheel circumference of the outer rim:

__________________________________________________________________________________________________

Each bug is assigned their own distances, which they have to travel in exactly the same amount of time. If you were a runner on a track, you'd have to run at a much higher rate of speed on the outer rim to arrive at the finish at the same time as the runner on the shorter track. This is why track position is so important in running, auto racing and why they change lane positions in speed skating.

Edited by sjordan2
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But Skip, in your example, the runners are discrete objects that move at their own pace independent of the others.

Ok, let's look at this another way.

Imagine a horizontal disk exactly one mile in circumference. It rotates on a vertical axis. Let's assume it rotates at a speed of 60 RPM (one complete revolution per second).

Place a bug at the outermost edge of that disk. If the disk is rotating at 60 RPM (one complete revolution per second), the bug will have traveled one mile (the circumference of the disk) in one second... right?

Now place a second bug exactly halfway between the axis and the outer edge of the disk. In one rotation of the disk, that bug will travel only one half the distance that the bug on the outer edge will travel, because that bug is sitting exactly halfway between the axis and the outer edge... or in other words, at the point where the circumference of one rotation would be one half mile.

So the "halfway bug" travels 1/2 mile per revolution, while the "outer edge" bug travels twice as far (one mile) per revolution. The disk takes one second to make one revolution... so no matter where on that disk the bug sits, it will take that bug exactly one second to make one complete revolution. Yet the "outer edge" bug travels twice as far as the "halfway bug" per each revolution.

Does that break some law of physics?

Here comes the headache again... :lol:

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But Skip, in your example, the runners are discrete objects that move at their own pace independent of the others.

Ok, let's look at this another way.

Imagine a horizontal disk exactly one mile in circumference. It rotates on a vertical axis. Let's assume it rotates at a speed of 60 RPM (one complete revolution per second).

Place a bug at the outermost edge of that disk. If the disk is rotating at 60 RPM (one complete revolution per second), the bug will have traveled one mile (the circumference of the disk) in one second... right?

Now place a second bug exactly halfway between the axis and the outer edge of the disk. In one rotation of the disk, that bug will travel only one half the distance that the bug on the outer edge will travel, because that bug is sitting exactly halfway between the axis and the outer edge... or in other words, at the point where the circumference of one rotation would be one half mile.

So the "halfway bug" travels 1/2 mile per revolution, while the "outer edge" bug travels twice as far (one mile) per revolution. The disk takes one second to make one revolution... so no matter where on that disk the bug sits, it will take that bug exactly one second to make one complete revolution. Yet the "outer edge" bug travels twice as far as the "halfway bug" per each revolution.

Does that break some law of physics?

Here comes the headache again... :lol:

You answered your own question... the bug close to the center point has a shorter distance to travel, Think of it as a gear reduction...

Your cam shaft and crank shaft are chained together but turn at diff speeds... ;)

Edited by moparmagiclives
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