- #1
guigabyte
- 8
- 7
Let's assume there is a device that can hold fresh meat in a stationary position, and this device can spin at relatively high speeds. Would this allow fresh meat to last longer without freezing?
Preserve Fresh Meat: Spin at Relativistic Speeds?
- B
- Thread starter guigabyte
- Start date
-
- Tags
- Relativistic Spinning
In summary: Yes, the temperature can still be defined as the derivative of the velocity with respect to the distance from the center of the centrifuge.
- #2
- 1,986
- 964
I guess it might, but it would take astronomically more energy than just running a freezer 
- #3
Ibix
Science Advisor
- 11,992
- 13,742
You could put it in a high velocity centrifuge, yes. In principle.
But the energy cost to achieve significant time dilation is pushing the annual energy output of a country - per kilogram. And the centrifugal force would turn the meat into strawberry jam. And probably disintegrate the centrifuge with devastating consequences for any nearby cities.
But the energy cost to achieve significant time dilation is pushing the annual energy output of a country - per kilogram. And the centrifugal force would turn the meat into strawberry jam. And probably disintegrate the centrifuge with devastating consequences for any nearby cities.
Last edited:
- #4
mfb
Mentor
- 37,141
- 13,983
The meat would disintegrate. In addition, the center would not experience time dilation.
If the meat survives 1000 g and we build a racetrack around the whole Earth, we can give the meat a maximal speed of ##v= \sqrt {R \cdot 1000 g} = 250 \frac{km}{s}##. This leads to a time dilation factor of 1.00000034. For 1 day for us, the meat experiences 0.03 seconds less. Not a very effective way to preserve it.
Let's make a big ring around Earth following the Moon's orbit. We can now achieve a speed of 1900 km/s. We now have a time dilation factor of 1.000019. For every day on Earth the meat ages 1.7 seconds less. Unfortunately the meat needs some time to get to this ring - much more than 1.7 seconds.
Let's dismantle Earth and replace it by a ring around the Sun with the same diameter as Earth's orbit. Now we can increase the speed to 40,000 km/s, more than 10% the speed of light. The time dilation factor is now 1.0084, for every day the meat experiences 12 minutes less. Still not very effecive. Note that "days" are not a good measure of time any more as there is no rotating Earth left in this scenario.
If the meat survives 1000 g and we build a racetrack around the whole Earth, we can give the meat a maximal speed of ##v= \sqrt {R \cdot 1000 g} = 250 \frac{km}{s}##. This leads to a time dilation factor of 1.00000034. For 1 day for us, the meat experiences 0.03 seconds less. Not a very effective way to preserve it.
Let's make a big ring around Earth following the Moon's orbit. We can now achieve a speed of 1900 km/s. We now have a time dilation factor of 1.000019. For every day on Earth the meat ages 1.7 seconds less. Unfortunately the meat needs some time to get to this ring - much more than 1.7 seconds.
Let's dismantle Earth and replace it by a ring around the Sun with the same diameter as Earth's orbit. Now we can increase the speed to 40,000 km/s, more than 10% the speed of light. The time dilation factor is now 1.0084, for every day the meat experiences 12 minutes less. Still not very effecive. Note that "days" are not a good measure of time any more as there is no rotating Earth left in this scenario.
- #5
sweet springs
- 1,223
- 75
Very interesting. Time dilation preserve food. I would like to add here a point of temperature. I am still puzzled freeze meet is cooled or warmed by motion?
- #6
mfb
Mentor
- 37,141
- 13,983
Temperature and motion are independent.
- #7
sweet springs
- 1,223
- 75
Some old books say differently [tex]T=T_0,T=\frac{T_0}{\gamma},T=\gamma T_0[/tex] I agree ice is ice for everybody not boiling water to anyone.
- #8
mfb
Mentor
- 37,141
- 13,983
These equations are different relations between temperatures as seen by different frames, for different choices of the definition of temperature. If you want things to boil at the same temperature, for example, you need the first one, where temperature is the same in all reference frames.
You can freely choose the temperature of the meat in its rest frame independent of the velocity.
You can freely choose the temperature of the meat in its rest frame independent of the velocity.
- #9
davidge
- 554
- 21
Is the definition of temperature as ##\partial U / \partial S## still valid in this case?
Related to Preserve Fresh Meat: Spin at Relativistic Speeds?
1. How does spinning meat at relativistic speeds preserve its freshness?
When meat is spun at relativistic speeds (close to the speed of light), it experiences time dilation. This means that time appears to pass more slowly for the spinning meat compared to stationary meat. This slower passage of time slows down the biochemical reactions that cause meat to spoil, effectively preserving its freshness.
2. Is it safe to eat meat that has been spun at relativistic speeds?
Yes, it is safe to eat meat that has been spun at relativistic speeds. The process does not introduce any harmful chemicals or radiation to the meat. However, it is important to note that the meat must still be properly stored and cooked to prevent any contamination or foodborne illnesses.
3. What is the optimal speed for preserving fresh meat?
The optimal speed for preserving fresh meat is close to the speed of light, which is approximately 299,792,458 meters per second. However, the exact speed may vary depending on factors such as the type of meat and the length of time it needs to be preserved.
4. Can any type of meat be preserved using this method?
Yes, this method can be used to preserve any type of meat, including beef, pork, chicken, and fish. However, it may be more effective for certain types of meat, such as red meat, which spoils faster than others.
5. Are there any downsides to preserving meat using this method?
There are a few downsides to preserving meat using this method. First, it requires advanced technology and equipment to spin meat at relativistic speeds. Second, the process is time-consuming and may not be practical for large quantities of meat. Lastly, there is a risk of meat becoming overcooked or altered in texture due to the extreme speeds.
Similar threads
-
Special and General Relativity
-
Special and General Relativity
-
Special and General Relativity
-
Special and General Relativity
-
Special and General Relativity
-
Special and General Relativity
-
Quantum Physics