Thermodynamics Forum

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Undergrad Perfect gas in a box with a piston

  • Aleoa
  • · Replies 8 ·
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8

Graduate What is the relationship between TdS and dU in the thermodynamics identity?

  • PeteSampras
  • · Replies 6 ·
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6

Graduate How did H.K. Onnes measure temperature and resistivity?

  • DariusP
  • · Replies 7 ·
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7

Undergrad Thermal dilation formula discrepancy?

  • lookez
  • · Replies 5 ·
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5

Undergrad Can black body retain it`s absorbed heat energy?

  • CHANDRABHAN
  • · Replies 3 ·
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3

High School How does insulating glass use vacuum or gas to reduce heat transfer?

  • zuz
  • · Replies 4 ·
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4

Graduate Cherenkov Radiation: Investigating the Angle

  • Apashanka das
  • · Replies 2 ·
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2

Graduate Photon upconversion and second law of thermodynamics

  • Papatom
  • · Replies 8 ·
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8

High School Adiabatic or Isobaric process?

  • Terry Bing
  • · Replies 61 ·
3
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61

High School Is Infrared Light a kind of light or just heat?

  • kevin123
  • · Replies 7 ·
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7

Undergrad Thermal expansion of air inside a bottle -- some questions....

  • James124900
  • · Replies 22 ·
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22

Undergrad Stefan-Boltzmann Law: IvdvcosΘdw Explained

  • Apashanka das
  • · Replies 1 ·
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1

Undergrad Using an IR Thermal Gun to check for steam passing valves

  • Aptx4869
  • · Replies 2 ·
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2

Graduate Change of Temperature from Work in Hydrostatic System

  • BobaJ
  • · Replies 10 ·
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10

Undergrad Heat transfer from a closed cylinder filled with fluid

  • msteves
  • · Replies 6 ·
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6

Undergrad Kinetic & Potential Energy of 0° Ice/Water: Examined

  • titansarus
  • · Replies 3 ·
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3

Undergrad What factors affect the heating time of a water bottle on a radiator?

  • FelixLudi
  • · Replies 3 ·
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3

Undergrad Confusion about relation of entropy with temperature.

  • Engineer1
  • · Replies 2 ·
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2

High School Warm air goes up....reason on a microscopic scale?

  • Wrichik Basu
  • · Replies 81 ·
3
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81

Undergrad Why does entropy increase when hot water is mixed with cold?

  • Engineer1
  • · Replies 12 ·
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12

Undergrad Why do hot metals emit radiation - atom vibrations?

  • mrmojorizing8
  • · Replies 1 ·
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1

Undergrad MRI & White Gold: Is Heating a Risk?

  • razidan
  • · Replies 8 ·
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8

High School Reading properties from a steam table

  • physea
  • · Replies 2 ·
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2

High School Analyzing open steady flow systems with SFEE vs. Rankine cycle analysis

  • physea
  • · Replies 9 ·
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9

Graduate Viscosity and thermal diffusivity in liquids and gases

  • dRic2
  • · Replies 2 ·
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2

High School Why do objects have internal energy?

  • Vectronix
  • · Replies 2 ·
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2

High School Equations that describe ideal gas processes

  • physea
  • · Replies 6 ·
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6

Graduate Entropy and heat bath/reservoir

  • dRic2
  • · Replies 10 ·
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10

Undergrad 1st Law of Thermodynamics?

  • Tsunnnami
  • · Replies 4 ·
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4

Undergrad Mechanical Collision: Measuring Sound & Heat

  • Lukeblackhill
  • · Replies 5 ·
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5

Undergrad I can’t understand the derivation of the formula Cp=Cv+nR

  • Clara Chung
  • · Replies 4 ·
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4

Graduate Endurance limit / fatigue strength at high temperatures

  • kajalschopra
  • · Replies 1 ·
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1

Graduate Measurable consequences of entropy of mixing

  • crossword.bob
  • · Replies 3 ·
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3

Undergrad Finding the Condensed amount of water from a changing Temperature Airmass

  • gooseman
  • · Replies 2 ·
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2

Graduate Trying to reconcile two definitions of Entropy

  • badatstuff
  • · Replies 4 ·
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4

Undergrad Black Body and the colored objects around us

  • fog37
  • · Replies 8 ·
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8

Graduate Is there a highest temperature?

  • Serra Nova
  • · Replies 17 ·
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17

Undergrad Heating a small greenhouse - heat loss

  • Appiani
  • · Replies 6 ·
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6

High School Time it takes to convert one form of energy to another?

  • vaidya14
  • · Replies 6 ·
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6

Graduate What Is the Frequency of Radiation Emitted by a Constantly Accelerating Charge?

  • bocchesegiacomo
  • · Replies 7 ·
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7

Graduate Nearly Perfect Efficiency - 2nd Law of Thermodynamics

  • ObjectivelyRational
  • · Replies 4 ·
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4

Undergrad Thermal efficiency of a Diesel engine

  • xJJx
  • · Replies 1 ·
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1

Undergrad Does entropy increase with improbability?

  • MeneMestre
  • · Replies 2 ·
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2

Undergrad Time to warm a volume of air to room temperature in a container

  • RecoveringMoron
  • · Replies 2 ·
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2

Weird sound coming from thermos flask

  • Wrichik Basu
  • · Replies 5 ·
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5

Undergrad How Does Helmholtz Free Energy Change During Constant Temperature and Volume?

  • Getterdog
  • · Replies 11 ·
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11

High School Trouble understanding Newton's Third Law in Pulleys

  • Abu
  • · Replies 7 ·
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7

Graduate An aqueos solution of ##M^+X^-## from Kubo's problems book

  • MathematicalPhysicist
  • · Replies 2 ·
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2

Undergrad Liquid-gas phase transition: metastable mixed states?

  • freemp
  • · Replies 1 ·
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1

Graduate Zeros of the partition function (Yang-Lee and Fisher zeros)

  • diegzumillo
  • · Replies 2 ·
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2

Undergrad Would an object heat up or cool down more quickly?

  • Naser Tay
  • · Replies 2 ·
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2

High School Relation between pressure and volume when heating a gas

  • ElectricRay
  • · Replies 4 ·
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4

High School Why did the water drops bounce instead of vaporizing on the hot cooker?

  • Makadamij
  • · Replies 1 ·
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1

Undergrad Confusion between adiabatic and energy

  • TimeRip496
  • · Replies 20 ·
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20

Graduate Question about Gibbs free energy from Kubos' Thermodynamics

  • MathematicalPhysicist
  • · Replies 10 ·
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10

Undergrad Do Windmills Violate the Second Law of Thermodynamics?

  • Papatom
  • · Replies 8 ·
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8

Graduate Enthelpy in Throttle Process (Joule–Thomson expansion)

  • MisterX
  • · Replies 1 ·
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1

Graduate Understanding Entropy and the 2nd Law of Thermodynamics - comments

  • Chestermiller
  • · Replies 65 ·
3
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Undergrad Isothermal Expansion: Explained

  • Fibo112
  • · Replies 2 ·
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2

Graduate Surprise? Entropy changes for systems in a canonical state

  • maajdl
  • · Replies 1 ·
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1

Graduate Partial derivatives and thermodynamics

  • voila
  • · Replies 9 ·
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9

Graduate Blackbody Radiation: Explained!

  • Arup Biswas
  • · Replies 19 ·
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19

Undergrad Do SI Units Eliminate the Need for Mechanical Equivalent of Heat?

  • Nikhil Rajagopalan
  • · Replies 5 ·
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5

Undergrad Can Atoms Be Stretched and Do Rigid Bodies Heat Up Under Force?

  • Paul Howard A
  • · Replies 8 ·
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8

Undergrad Why is the 'TS term' included in the expression for Gibbs free energy?

  • wannabegenuin
  • · Replies 10 ·
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10

Graduate Unlocking Realistic Rotational Collisions with Physics & Graphics Engines

  • cmcraes
  • · Replies 1 ·
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1

Graduate Light from Cherenkov radiation

  • TheCanadian
  • · Replies 2 ·
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2

Graduate Temperature of Space: Atomic/Molecular Motion & Equilibria

  • Frank Peters
  • · Replies 3 ·
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3

Undergrad Is Energy Partially Spent on State Change Below 100°C?

  • EEristavi
  • · Replies 13 ·
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13

High School Difference Between Heat & Agitation - Atomic Scale

  • CuriousBanker
  • · Replies 3 ·
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3

Graduate Heat energy input from a hot source in a heat engine

  • Franz Rojas Ayala
  • · Replies 11 ·
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11

Undergrad Internal energy and total heat of universe

  • CuriousBanker
  • · Replies 3 ·
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3

Undergrad Negative Kelvin? How Is It Possible?

  • Chemmjr18
  • · Replies 2 ·
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2

Graduate Relation of EM radiation equation to radioactive decay

  • zgoddard3
  • · Replies 3 ·
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3

Undergrad Correct statement of 2nd law of thermodynamics?

  • Karagoz
  • · Replies 5 ·
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5

Undergrad Kelvin and Platinum Temperature Scale.

  • Vivek098
  • · Replies 3 ·
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3

Undergrad Does Pressure Multiplied by Volume and Volumetric Flow Rate Equal Force?

  • FADFAD1
  • · Replies 6 ·
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6

Undergrad Cooler objects able to increase the temperature of warmer objects?

  • JR Wakefield
  • · Replies 35 ·
2
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35

Graduate Emitted Radiation: Understanding Radiative Damping & Frequency Multiples

  • foobar
  • · Replies 1 ·
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1

Graduate Why is blackbody radiation continuous?

  • TheCanadian
  • · Replies 2 ·
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2

Undergrad Newton's first law of motion and Inertial Systems

  • rohit dutta
  • · Replies 2 ·
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2

Undergrad Thermal Night Vision: Physics Explained

  • Lugonja
  • · Replies 6 ·
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6

High School Why is a black surface a better emitter of IR than a silvered surface?

  • Glenn G
  • · Replies 1 ·
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1

Graduate Absolute zero temperature is impossible to achieve?

  • Chad Jensen
  • · Replies 6 ·
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6

Graduate Straight line plot of bipolar transistor - temperature?

  • Strides
  • · Replies 13 ·
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13

Undergrad Can a Body of Water's Temperature Rise Linearly with Constant Heating?

  • DaveC426913
  • · Replies 19 ·
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19

Undergrad How to approach a more perfect blackbody?

  • Ron19932017
  • · Replies 5 ·
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5

Undergrad Heat engines can organize thermal energy

  • fog37
  • · Replies 7 ·
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7

Graduate A technical question about the Joule-Thomson Experiment

  • MathematicalPhysicist
  • · Replies 6 ·
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6

Graduate Change of radiation pressure of sunlight w.r.t. distance

  • HastiM
  • · Replies 6 ·
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6

Undergrad Newton´s second law: Force definition? (Philosophy matter).

  • Luis Babboni
  • · Replies 2 ·
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2

Graduate Can KE be reformulated using |v| instead of v^2?

  • BallisticDisks
  • · Replies 5 ·
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5

Undergrad Energy transfer during uphill vs downhill running

  • Joey Wilson
  • · Replies 9 ·
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9

Graduate Energy of beamed EM field that can heat human tissue

  • BuCDr3H4
  • · Replies 1 ·
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1

Undergrad Processes that determine the color of fire

  • RubinLicht
  • · Replies 10 ·
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10

Undergrad Computer engineering projects for physics. Proposals?

  • Samira
  • · Replies 2 ·
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2

Graduate Modeling analytical solution of 1D heat equation

  • Atr cheema
  • · Replies 7 ·
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7

Graduate Elastic collisions and Newton's third law

  • Renato776
  • · Replies 2 ·
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2

Undergrad Solar cooker pots -- Does their color matter?

  • entityfree
  • · Replies 8 ·
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8

Undergrad Compressed Nitrogen: Calculating Pipe Flow Time

  • Nicholas Hankins
  • · Replies 16 ·
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16