12-05-2020 16:37 | |
DRKTS★★☆☆☆ (305) |
Z06norway wrote:DRKTS wrote:Z06norway wrote:DRKTS wrote:I looked up sunspot data and cant find the 1957 peak, it seems sunspot Wass up all the way to 2005 ? This is directly from SIDC web page.... explain please.... http://sidc.oma.be/press/01/welcome.htmlseaninak wrote: Where does she say anything about energy from the Sun Peaking in 2000? |
12-05-2020 17:59 | |
JackFou★☆☆☆☆ (114) |
IBdaMann wrote: No, not with all photons. It depends on the wavelenght of the photon and the composition of the receiving object. There must be two energy levels in the absorbing element with a gap between them that corresponds to the energy of the photon and the receiving atom or molecule must be able to transfer the energy to its surrounding by collisions. However, if *one* photon of one particular wavelength can be absorbed and converted to thermal energy so can *all* photons of the same wavelength regardless of whether they originated from a hotter or from a colder object. The absorbing surface doesn't know whether the photon came from a hotter or a colder object, it cannot possibly differentiate them. Therefore, thermal radiation emitted by a colder object can be absorbed by a warmer object and converted into thermal energy. But since the hotter object will always emit *more* energy than it receives during any period of time (that's kind of the definition of being hotter than the environment), the absorption of the incident photons from a colder object do not result in an increase in the macroscopic temperature of the object. IBdaMann wrote: If they're so fundamentally separate topics then how can thermal energy be transferred through space without using photons? IBdaMann wrote: No. There is no distraction. Emission and absorption of photons is *exactly* how thermal energy transfer happens through space. Thermal energy is kinetic energy (motion of particles) and electromagnetic energy is potential energy. Just as a swinging pendulum continuously converts potential energy into kinetic energy and back, two objects emitting and absorbing each others thermal radiation are continuously converting thermal energy into potential energy and back again. Edited on 12-05-2020 18:02 |
12-05-2020 21:17 | |
Into the Night★★★★★ (22536) |
JackFou wrote: It is not possible to measure the temperature of the Earth. There is no 'global temperature trend'. Mantras 25g. The Parrot Killer Debunked in my sig. - tmiddles Google keeps track of paranoid talk and i'm not on their list. I've been evaluated and certified. - keepit nuclear powered ships do not require nuclear fuel. - Swan While it is true that fossils do not burn it is also true that fossil fuels burn very well - Swan |
12-05-2020 21:18 | |
DRKTS★★☆☆☆ (305) |
Thermal energy, internal energy present in a system in a state of thermodynamic equilibrium by virtue of its temperature. (Britannica) Thermal energy can do no work (TDE). Whereas kinetic energy can (0.5* m * v^2) so they are not equivalent Electromagnetic energy (E=hc/lambda=hf) is not potential energy (mgh) You are correct that a pendulum converts potential energy to kinetic energy as it swings. But the temperature (thermal energy) of the pendulum does not change. |
12-05-2020 22:43 | |
JackFou★☆☆☆☆ (114) |
DRKTS wrote: Sometimes I feel like this forum got stuck a few hundred years ago when people thought heat was some kind of invisible liquid called "caloric", pouring in and out of objects. All forms of energy can be converted into other forms at will. There is nothing special about thermal energy. Thermal energy can easily be converted into electromagnetic energy and back. Any object above 0 K is constantly losing thermal energy by emitting photons. This mechanism can easily extend into the visible range and beyond as you can see with a glowing hot piece of metal. Absorption depends on the composition of the absorbing material but visible light can be transformed into thermal energy just as well as infrared light. A dark object will absorb most infrared and visible light photons and convert them into thermal energy. A white object might absorb infrared but will mostly emit absorbed visible light photons again without turning them into thermal energy. That's why dark objects get warmer in the sun than white objects. The reason why people often colloquially use infrared light synonymous with heat/warmth is because at temperatures commonly found on earth, thermal radiation only extends into infrared. However, visible light is just as much "thermal radiation" as is infrared light. DRKTS wrote: Thermal energy *is* kinetic energy -- just on the scale of atoms instead of macroscopic objects. "Thermal energy" is nothing other than the kinetic energy of particles bumping into each other. The more you heat an object, the faster its atoms move about. The gas law states that pV=nRT. If you increase the temperature of a gas while keeping the pressure constant it expands. Expansion against external pressure is work. That's how heat engines work. If you add enough thermal energy to water it becomes steam which can drive turbines. That's how we make electricity in coal-fired and nuclear power plants. In an internal combustion engine, chemical energy (another form of potential energy) is converted into thermal energy causing gas to expand rapidly which drives the engine. DRKTS wrote: Just like gravitational potential energy, electromagnetic energy cannot perform work. You need to convert it into another from of energy (kinetic energy of particles) in order to do work. DRKTS wrote: The pendulum was really just an analogy. A pendulum is a macroscopic object, atoms and photons are not. They don't behave the same way. Either way, without friction, you'd be correct. But since every pendulum will always have some friction (both internal and with the surrounding air), the kinetic energy will be converted into thermal energy as the pendulum slowly winds down over time. Edited on 12-05-2020 22:48 |
12-05-2020 23:24 | |
Into the Night★★★★★ (22536) |
JackFou wrote:IBdaMann wrote:JackFou wrote:So whatever is driving up temperatures since then, it cannot be an increase in solar activity. Math error. Failure to publish raw data. Failure to remove biasing influences on raw data. Failure to select by randN. Failure to normalize against paired randR. Failure to declare and justify variance. Failure to calculate margin of error. Attempt to predict using statistical analysis. Mantras 25c...25d...25e...25f...25g...4d...4f...20j...37c...37a... JackFou wrote: The data isn't valid. It is just random numbers. NASA has no capability to measure the temperature of the Earth. JackFou wrote: NASA is a government agency. Mantra 37a...37c...25c...25g...4d...4f... JackFou wrote: It is not possible to measure the temperature of the Earth. NASA can't do it either. Neither can NOAA nor any other government agency. The Parrot Killer Debunked in my sig. - tmiddles Google keeps track of paranoid talk and i'm not on their list. I've been evaluated and certified. - keepit nuclear powered ships do not require nuclear fuel. - Swan While it is true that fossils do not burn it is also true that fossil fuels burn very well - Swan |
12-05-2020 23:27 | |
Into the Night★★★★★ (22536) |
Z06norway wrote:JackFou wrote: It is not possible to determine what the temperature would have been if the cloud had not been there. It is not possible to determine the temperature would have been at a clear location if a cloud were to be there. Mantra 25g...20l...20o... The Parrot Killer Debunked in my sig. - tmiddles Google keeps track of paranoid talk and i'm not on their list. I've been evaluated and certified. - keepit nuclear powered ships do not require nuclear fuel. - Swan While it is true that fossils do not burn it is also true that fossil fuels burn very well - Swan |
12-05-2020 23:29 | |
Into the Night★★★★★ (22536) |
JackFou wrote:Z06norway wrote: NASA has no global temperature record. Random numbers are not data. Mantra 4d...4f...25g...37a...37c...circular argument fallacy (fundamentalism). The Parrot Killer Debunked in my sig. - tmiddles Google keeps track of paranoid talk and i'm not on their list. I've been evaluated and certified. - keepit nuclear powered ships do not require nuclear fuel. - Swan While it is true that fossils do not burn it is also true that fossil fuels burn very well - Swan |
13-05-2020 01:32 | |
James___★★★★★ (5513) |
Into the Night wrote:JackFou wrote:Z06norway wrote: I'll translate, ok? ITN has no understanding of what "is" is. He looks at his hands and asks no one there, what are these things? Are they real or just my imagination? Random mantras are not mantras. I wish I could have an actual thought but like clouds in the sky, you can try to grab one and hold on to it but will find out that it's out of reach. How to make sense of something that 'is" that cannot be grasped? |
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