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So you can call them a troll?
And yet I was right about adiabatic expansion. An idea that is beyond your comprehension. I have not fully checked your claim. You only required one, my second example may have been incorrect.
And once again Justa proves he cannot read articles nor does he know what a strawman argument is. That article is only about material very close to the Sun. That is not what we were discussing. Please try to understand the difference.
Nope, you are using a poor analogy here. What did you forget, again? You forgot that the steam is in an atmosphere. Try the same experiment in a vacuum and you will see the steam continuing to accelerate due to adiabatic expansion.
This is so obviously wrong that I will just refer you to the Ideal Gas Law. Again, adiabatic expansion says that even after leaving the source a gas will continue to accelerate.
This is just too hilarious coming from someone who thinks that "plasma" is a good enough explanation for anything.
Spamming your replies with science that you do not understand fools no one. Once again, this only apply very close to the Sun. The Sun's magnetic field drops off much faster than its gravity does. But then you do not understand how dipoles work, do you?
Oh, it burns, it truly does.
Adiabatic cooling occurs when the pressure of a substance is decreased as it does work on its surroundings. Adiabatic cooling occurs in the Earth's atmosphere with orographic lifting and lee waves, and this can form pileus or lenticular clouds if the air is cooled below the dew point. When the pressure applied on a parcel of air decreases, the air in the parcel is allowed to expand; as the volume increases, the temperature falls and internal energy decreases.
It's a private thread. Even I cannot get my questions answered.Wow. Just wow. Is there a single thread on here in which people can refrain from calling each other stupid?
It's public. No thread is private on CF, save for background moderator and admin threads.It's a private thread.
What do you mean, 'even I'?Even I cannot get my questions answered.
(I tried unsub'ing from this thread but that doesn't seem to work)
Yes, Justa, adiabatic heating is primarily done in cylinders. Luckily for me I was talking about adiabatic cooling. From the very sight you linked:
Adiabatic cooling can take place in space too. Guess where the energy form cooling the gas goes?
Once again you did not even read your own source properly.
As I said, it burns.
ETA: I almost forgot, the reason I emphasized primarily is that secondarily it can be atmospheric. It is very difficult to get adiabatic heating in space, but there are even places where that occurs. That process does not occur anywhere near our orbit, luckily.
New question:
The earth has a gravitational pull on everyone on its surface. The Earth spins on its axis and this spinning creates a centrifugal force acting against the pull of gravity.
Say my weight is 100 pounds at the moment, what would my weight be if the Earth stopped spinning? Would the difference be noticeable?
For about every 100kg you would weight about 1/3 kg less at the equator. Unless you lived on the arctic circle, in which case you would notice no difference at all.
The earth only rotates about .0007 RPM
The radius of the earth is 6,380 kilometers or 6,380,000 meters.
The velocity of the land is 463 meters/second. (2*pi*r/(24*3600))
Your mass is 100 kg.
So square the velocity, multiply by mass and divide by radius:
463^2 * 100 / 6,380,000 = 3.37 newtons.
The acceleration toward earth due to gravity is 9.8 m/s^2. The acceleration away from earth due to its rotation is 0.034 m/s^2. So if the earth were not revolving and you weighed yourself on the equator, the scale would think that your 100kg body weighs about a third of a kilogram more.
100kg = about 220 lbs., so you would weight roughly a little less than 1/2 lbs more if you weighed 100 pounds.
This applies at the equator, as the closer to the poles you get, the less centrifugal force you experience. Think of a playground carousel, the closer to the center, the less force you experience.
If the earth was rotating at just 1 RPM you would be slung out into space.
New question:
The earth has a gravitational pull on everyone on its surface. The Earth spins on its axis and this spinning creates a centrifugal force acting against the pull of gravity.
Say my weight is 100 pounds at the moment, what would my weight be if the Earth stopped spinning? Would the difference be noticeable?
More info.
The exact answer would depend upon your latitude, but the difference would be greatest at the equator. In addition to the effects of rotation, the shape of the earth also makes a difference. Since it bulges at the equator, you're further from the center of the earth, which also makes you a tiny bit lighter.
More info.
The exact answer would depend upon your latitude, but the difference would be greatest at the equator. In addition to the effects of rotation, the shape of the earth also makes a difference. Since it bulges at the equator, you're further from the center of the earth, which also makes you a tiny bit lighter.
Many Thanks - JJ
Of course this does not take into effect the difference that the scale would read, being it would not be undergoing those same centrifugal forces. Which is why scales must be adjusted based upon their distance from the equator, just as clocks must be adjusted. A standard 1kg weight has been calibrated at sea level on the equator, so would technically be greater than 1kg at the poles. But for simplicity sake we use the same calibration everywhere.
No, a kilogram would be a kilogram anywhere. Even in 0 G. A kilogram is not a unit of weight.
Now a 9.807 Newton weight would weigh a different amount at the equator than it would at the poles. But its mass would still be one kilogram.
Wrong, one kilogram at the pole weighs more than one kilogram. The reason you think it weighs the same is that your scale also changes. Just as a clock on the equator reads a different time than one on the pole, but while at the pole you yourself notice no difference in its rate.
This is because not only the clock changes, but every single atom that shares that frame of reference.
Weight - Wikipedia, the free encyclopedia
" For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon. In this sense of weight, a body can be weightless only if it is far away from any gravitating mass."
It is matter that does not change. A one kilogram mass will always have the same amount of matter, but not necessarily the same weight. Just as under acceleration your body has more energy and more felt weight, but not more matter.
And the kilogram is definitely a unit of weight.
Mass - Wikipedia, the free encyclopedia
"In physics, mass (from Greek μᾶζα "barley cake, lump [of dough]") is a property of a physical body which determines the body's resistance to being accelerated by a force and the strength of its mutual gravitational attraction with other bodies. The SI unit of mass is the kilogram (kg)....
As mass is difficult to measure directly, usually balances or scales are used to measure the weight of an object, and the weight is used to calculate the object's mass. For everyday objects and energies well-described by Newtonian physics, mass describes the amount of matter in an object. However, at very high speeds or for subatomic particles, general relativity shows that energy is an additional source of mass. Thus, any body having mass has an equivalent amount of energy, and all forms of energy resist acceleration by a force and have gravitational attraction."
Therefore a one kilogram mass can have several different weights, depending on its nearness to a gravitational source and its velocity. But even under acceleration it has more energy, but the amount of matter that it contains does not increase. The kilogram is the basic unit of weight or mass. A one kilogram weight on the pole will weigh more than one kilogram, as it will have a greater gravitational attraction due to less centrifugal force. However, any scales used to measure it will report no difference, since any standard kilogram test weight will also weigh more.
Curious About Astronomy: Does your weight change between the poles and the equator?
Just as you would weigh more at the poles, so would a one kilogram test mass. Only the amount of matter it contains will never change. But matter is not mass, and mass is not matter. Mass is equivalent to energy, and energy is equivalent to mass. So therefore the gravitational attraction of bodies is due to energy, not to matter. Energy may be converted to matter and matter may be converted to energy, but the mass of on object depends solely on its energy content, which may vary independent of the amount of matter it contains. All matter contains energy, but may contain more or less depending on its velocity, and therefore that same amount of matter may weigh more or less, or have more or less mass due simply to velocity or nearness to another gravitating source.
Common Weights and Measures (table) | Infoplease.com
Weight (Mass)
Metric System
1 milligram  =  1/1,000,000 kilogram  =  1/1,000 gram1 centigram  =  1/100,000 kilogram  =  1/100 gram1 decigram  =  1/10,000 kilogram  =  1/10 gram1 gram  =  1/1,000 kilogram1 dekagram  =  1/100 kilogram  =  10 grams1 hectogram  =  1/10 kilogram  =  100 grams1 kilogram (basic unit of weight or mass)1 metric ton  =  1,000 kilograms
Justa: "And the kilogram is definitely a unit of weight."
Justa fails high school physics again. And, as usual, digs himself deeper and quotes numerous sources he doesn't understand as a smokescreen.
Justa fails high school physics again. And, as usual, digs himself deeper and quotes numerous sources he doesn't understand as a smokescreen.
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