Thermodynamics Forum

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Undergrad How does the heating process work and can it be reversed?

  • motorman
  • · Replies 4 ·
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4

Undergrad Solving PV=nRT for Solids - How to Determine Temp?

  • Mechanic
  • · Replies 11 ·
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11

Undergrad Thermodynamics - Brayton Cycle

  • WCMU101
  • · Replies 1 ·
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1

Undergrad Enthelpy change for different processes.

  • olap001
  • · Replies 1 ·
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1

Graduate Calculating Nitrogen Specific Volume for Scientists

  • mikebb
  • · Replies 4 ·
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4

Graduate The Incompatibility of the 2nd Law of Thermodynamics and Quantum Fluctuations

  • southsider903
  • · Replies 7 ·
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7

Graduate Solving the Steffan-Boltzman Law: Transfer of Power from Left to Right Plate

  • shyta
  • · Replies 8 ·
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8

Graduate Degrees of Freedom of a Diatomic Gas: 5 or 7?

  • zorro
  • · Replies 3 ·
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3

High School Can microwave radiation penetrates building materials?

  • scottbekerham
  • · Replies 15 ·
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15

Undergrad Help with a thermo derivation?

  • allover
  • · Replies 1 ·
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1

Undergrad Classical Thermodynamics for Statistical Mechanics

  • msaleh87
  • · Replies 2 ·
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2

Undergrad What orbital pattern occurs when two bodies of equal mass orbit each other?

  • ionowattodo
  • · Replies 9 ·
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9

Undergrad How Does Pressure Inside Earth Maintain Its High Temperature?

  • Tor Barstad
  • · Replies 3 ·
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3

Graduate Cause of the Soret Effect/Thermophoresis?

  • Declan
  • · Replies 4 ·
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4

Undergrad Understanding Heat: Radiative, Convection & Conduction

  • Wannabeagenius
  • · Replies 9 ·
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9

Undergrad I can't figure out why this happens with pure substances. My book is a

  • Curl
  • · Replies 2 ·
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2

Undergrad Does evolution violate the second law of thermodynamics?

  • dcderek24
  • · Replies 18 ·
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18

Undergrad Specific heats relating to ideal gas properties?

  • dillonmhudson
  • · Replies 1 ·
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1

Undergrad A general curve for the coffee cup problem.

  • mooobag
  • · Replies 1 ·
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1

Graduate Entropy & Order: A Puzzling Paradox

  • JJRittenhouse
  • · Replies 14 ·
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14

Graduate Why Does Early Universe Have Low Entropy?

  • mrspeedybob
  • · Replies 1 ·
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1

Undergrad If temperature gradients cause wind in air, how about in zero gravity?

  • Buzzworks
  • · Replies 11 ·
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11

Graduate Diffuse microwave/far infrared heating as a replacement for space heaters?

  • Twinbee
  • · Replies 4 ·
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4

High School How can Dirty clothes effect the Insulation?

  • MQTUAE
  • · Replies 17 ·
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17

High School Why Does Temperature Change on Mountains as You Get Closer to the Sun?

  • touqra
  • · Replies 11 ·
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11

Undergrad If light causes radiation pressure, what about sound waves?

  • Buzzworks
  • · Replies 2 ·
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2

Graduate How Much Thermal Energy is Required for a Four Month Space Mission?

  • CIm
  • · Replies 4 ·
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4

Undergrad Rock On Rod Stewart: Am I a Universe-Rule-Changer?

  • one_q_a_day
  • · Replies 9 ·
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9

Graduate How does the Boltzmann statistic relate to systems at high temperatures?

  • Cosmossos
  • · Replies 1 ·
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1

Graduate Is the rate of entropy of a closed system constant?

  • kfmfe04
  • · Replies 13 ·
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13

Graduate EM radiation => Self propagating wave ?

  • Sirandar
  • · Replies 6 ·
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6

Undergrad Applied heat and thermodynamics.

  • Harrybarlow
  • · Replies 3 ·
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3

Undergrad Enthelpy vs. Internal Energy (Thermodynamics)

  • Kubus
  • · Replies 26 ·
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26

High School What is Entropy and How Does It Impact Our World?

  • blumist
  • · Replies 2 ·
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2

Undergrad Thermal Equilibrium: Conditions and Application

  • tme92
  • · Replies 2 ·
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2

High School Discover the Basics of Blackbodies: Definition and Properties Explained

  • DontPanic
  • · Replies 3 ·
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3

Graduate How Does Entropy Differ Between System Equilibrium and Individual States?

  • Thalion
  • · Replies 2 ·
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2

Undergrad Kelvin Temperature - Celsius Temperature Change

  • Davidrdguez
  • · Replies 12 ·
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12

High School Using physics to produce heat - need some ideas

  • orangeglow
  • · Replies 4 ·
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4

Undergrad Can gas pressure and density be reduced without changing temperature?

  • mishima
  • · Replies 1 ·
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1

Graduate Can i expand non-ideal gas reversibly isomermally?

  • kntsy
  • · Replies 2 ·
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2

High School Temperature of Gas: What's Happening to Atoms/Molecules?

  • Drakkith
  • · Replies 5 ·
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5

Graduate Ideal Gas: Non-Uniform Conditions Explained

  • mikeph
  • · Replies 3 ·
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3

Undergrad What Actually Is Energy?

  • AJ_2010
  • · Replies 3 ·
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3

Graduate When will the entropy of universe(an isolated system) stop increasing?

  • kntsy
  • · Replies 1 ·
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1

Graduate Why ds=0 only in a steady rev. process?

  • Cosmossos
  • · Replies 10 ·
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10

Graduate Understanding Pressure Variation with Altitude in a Horizontal Slab of Air

  • greencheeseca
  • · Replies 1 ·
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1

Undergrad Quick Internal Energy Question

  • AirForceOne
  • · Replies 1 ·
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1

High School Experiment with Bottle: Hot Air, Freezer & Pressure

  • Bzdzwongul
  • · Replies 3 ·
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3

Graduate Resolving the Paradox of Entropy and Energy

  • Cosmossos
  • · Replies 33 ·
2
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Undergrad What Variables are Zero in Different Thermodynamic Conditions?

  • tyrasia
  • · Replies 2 ·
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2

Undergrad Can a Real-World Carnot Engine Achieve Carnot Efficiency?

  • kntsy
  • · Replies 5 ·
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5

Graduate Entropy & Enthelpy - A Weird Deduction from Class

  • nonequilibrium
  • · Replies 20 ·
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20

Undergrad No change in entropy of the system+surroundings in reversible process.Really?

  • kntsy
  • · Replies 2 ·
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2

Graduate Puzzled: why is this even linear? Must it be? Looking for clarification

  • nonequilibrium
  • · Replies 37 ·
2
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37

Undergrad Physics Project involving ice, gases, and global warming

  • Peter P.
  • · Replies 5 ·
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5

Graduate Open & Closed/Thermodynamic proofing

  • jaebaeli
  • · Replies 1 ·
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1

Graduate Contradiction/breach 2nd law? Simply with carnot engine + negative temperature

  • nonequilibrium
  • · Replies 116 ·
4
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Graduate Estimation of diffuse and direct radiation starting from the global radiation

  • FrancescoP
  • · Replies 1 ·
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1

Graduate Constant volume Specific heat and internal energy relationship in nonideal gas.

  • kntsy
  • · Replies 1 ·
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1

Undergrad Measuring Heating Power at High Temperatures

  • acoustic
  • · Replies 9 ·
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9

Graduate Solvation Heat Pump Introduction | Thermodynamics Understanding

  • striphe
  • · Replies 4 ·
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4

Undergrad How can air displacement balance out forces in Newton's third law?

  • jsmith613
  • · Replies 12 ·
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12

Undergrad A few questions on Thermodynamics

  • Dennis_Murphy
  • · Replies 17 ·
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17

Graduate University thermodynamics fundamental equation/identity derivation.

  • kntsy
  • · Replies 2 ·
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2

High School Energy Conversion: KWH/M2, MWH/CM2 & WATT/M2

  • Smile_Face
  • · Replies 4 ·
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4

Graduate Heat from an infinite reservoir?

  • Dawei
  • · Replies 7 ·
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7

High School What Technologies Can Supply High Temperatures and Where Are They Needed?

  • acoustic
  • · Replies 15 ·
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15

Graduate Partition function in Statistical Physics

  • Hymne
  • · Replies 1 ·
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1

High School How does a fan cool your skin, exactly?

  • brainstorm
  • · Replies 11 ·
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11

Graduate Can atoms reach absolute zero energy and what happens then?

  • Mu naught
  • · Replies 17 ·
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17

Undergrad The Physics of Le Chatelier's Principle

  • Markymark137
  • · Replies 4 ·
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4

Undergrad Thermal expansion of a metal round disk with hole in the middle

  • tbone_nl
  • · Replies 3 ·
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3

High School What is the difference between adding heat and adding cold?

  • dreimd
  • · Replies 60 ·
3
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60

Undergrad Quasi equilibrium and non flow reversible in a simpler way?

  • mikhailpavel
  • · Replies 1 ·
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1

High School What is the amount of energy released from an exploding firecracker?

  • Sack Boy
  • · Replies 3 ·
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3

Undergrad Questions RE: radiation pressure

  • alphawolf50
  • · Replies 6 ·
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6

Graduate Rectennas and 2nd law of thermodynamics

  • theDoc
  • · Replies 9 ·
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9

Graduate Maximal Entrop, Temperature & Energy Transfer

  • azaharak
  • · Replies 4 ·
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4

Undergrad Temperature of Water in a Moving Plane

  • eranium
  • · Replies 3 ·
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3

High School Why is it that things feel ''hot''?

  • Biologik
  • · Replies 4 ·
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4

Undergrad (Hopefully) simple thermodynamics question

  • AxiomOfChoice
  • · Replies 1 ·
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1

Graduate Differentials in the context of thermodynamics

  • AxiomOfChoice
  • · Replies 7 ·
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7

Graduate Zeh: Basics of Basics of Thermodynamics, yet really confused

  • nonequilibrium
  • · Replies 5 ·
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5

Undergrad Seeking Info on Plasma Propulsion Engine Design

  • Karoka
  • · Replies 8 ·
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8

Graduate 100% Efficient Transfer of Energy

  • grounded
  • · Replies 11 ·
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11

Undergrad Thermodynamics Basics: Questions Answered

  • Urmi Roy
  • · Replies 50 ·
2
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50

Undergrad Natural-Free Convection between Vertical Plates

  • stevekho
  • · Replies 1 ·
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1

Graduate Understanding Deviations in Wien's Law for Long Wavelengths

  • nonequilibrium
  • · Replies 2 ·
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2

Graduate Can Entropy of an Ideal Gas Decrease?

  • AxiomOfChoice
  • · Replies 3 ·
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3

Undergrad Free expansion and adiabatic process

  • sita1
  • · Replies 2 ·
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2

Undergrad How does a laser heat up a material?

  • v_pino
  • · Replies 1 ·
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1

High School What's the difference between isothermal and adiabatic processes?

  • AxiomOfChoice
  • · Replies 3 ·
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3

Undergrad Decreasing Ambient Heat w/ Heat Sink

  • Dryerasethis
  • · Replies 4 ·
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4

High School How Does a Thermostat Activate Heating?

  • fawk3s
  • · Replies 3 ·
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3

Graduate Thermodynamics issue with absorption heat pumps

  • striphe
  • · Replies 1 ·
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1

Graduate What caused the increase in entropy after the Big Bang?

  • Gerinski
  • · Replies 9 ·
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9

Undergrad Schaums Outline: Entropy Ques - Tmp Not Constant

  • p75213
  • · Replies 4 ·
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4

Graduate Flywheel Energy Storage and small engine

  • grey
  • · Replies 7 ·
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7

Undergrad Problem with Newtons second law

  • Physonic
  • · Replies 3 ·
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3