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Graduate About Entropy and Poincare Recurrence

  • hilbert2
  • · Replies 7 ·
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7

Undergrad Cylinder Compression: Pressure & Temperature Change

  • Pau Hernandez
  • · Replies 5 ·
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5

Undergrad How Do Carnot's Efficiency Formulas for Heat Engines Align?

  • Tulio Cesar
  • · Replies 1 ·
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1

High School Which cheap metal would absorb and radiate heat well?

  • Anubhab2000
  • · Replies 17 ·
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17

Undergrad Why the heat of vaporization decreases with increasing temperature ?

  • Jano L.
  • · Replies 14 ·
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14

Undergrad Temperature Profile -- temperature-length curve of a metal bar

  • KishoreAM
  • · Replies 23 ·
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23

High School Two friends A and B went to a restaurant and ordered a cup

  • Akhand
  • · Replies 1 ·
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1

Undergrad Does Wearing Black at Night Keep You Cooler?

  • pkc111
  • · Replies 3 ·
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3

Graduate Swimming pool heating by 16 car radiators on hot loft

  • Sten Larsen
  • · Replies 26 ·
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26

Undergrad Calculating the output temperature of a Solar Thermal system

  • spoonjabba
  • · Replies 7 ·
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7

Undergrad What moves the piston in a Carnot heat engine?

  • trigger701
  • · Replies 7 ·
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7

Graduate Transparency, colours and heating of materials

  • Vrbic
  • · Replies 6 ·
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6

Undergrad Perfect" Radiators & Absorbers: Why Materials Differ

  • pkc111
  • · Replies 2 ·
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2

High School Do things burn because of the flame or the heat?

  • AMan24
  • · Replies 13 ·
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13

High School Could these statments define energy?

  • Spidermanda
  • · Replies 31 ·
2
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31

High School Hello all, lay-man's question about gas laws

  • Oobray
  • · Replies 6 ·
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6

Graduate How possibly can heat flow between equally hot bodies?

  • Omar Nagib
  • · Replies 17 ·
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17

Undergrad Why do we see the claim that an isentropic process is adiabatic and reversible?

  • mfig
  • · Replies 18 ·
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18

Undergrad Question about fluid expansion

  • adoion
  • · Replies 6 ·
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6

Undergrad Entropy: What Is Unavailable Energy & Real-Life Examples

  • Sundown444
  • · Replies 13 ·
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13

Undergrad Would any physical event happen at absolute zero?

  • Gerinski
  • · Replies 16 ·
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16

Undergrad Temperature & kinetic energy of particles in solid vs gas

  • Mr Balmond
  • · Replies 4 ·
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4

High School The shape of the body in Stefan Boltzmann Law modern use

  • george95
  • · Replies 14 ·
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14

Undergrad Understanding the Definition of Cp and its Relationship to Cv: Explained

  • 11thHeaven
  • · Replies 2 ·
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2

Undergrad Specific heat help -- cooling down a metal bar

  • Don9of11
  • · Replies 1 ·
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1

Graduate What is the connection between enthalpy, mass energy, and internal energy?

  • vjanandr
  • · Replies 6 ·
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6

High School Need a formula for this scenario....

  • Intle
  • · Replies 6 ·
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6

Undergrad Relative Humidity Inside a not so Perfectly Sealed Housing

  • Euan Foster
  • · Replies 2 ·
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2

High School Calculating Uncertainty of Mean Values for Enthalpy Change Measurements

  • Squidiemeister
  • · Replies 2 ·
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2

Undergrad Doubt regarding proof of Clausius Inequality.

  • weezy
  • · Replies 5 ·
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5

High School Is it possible to magnify light heat?

  • Dakota
  • · Replies 29 ·
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29

Undergrad What equations can help me understand Convectron gauges?

  • madcow
  • · Replies 1 ·
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1

Undergrad Calculate Minor Losses due to Flow Geometry Alone

  • Timtam
  • · Replies 3 ·
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3

Graduate Entropy of system and surroundings

  • Titan97
  • · Replies 3 ·
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3

Undergrad Temperature dependence of the index of refraction of air

  • cnunez12
  • · Replies 1 ·
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1

Graduate Thought Experiment on the Dual Nature of EM Radiation

  • Jim Lundquist
  • · Replies 15 ·
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15

Undergrad Inversion and Isenthelpic Curves for van der Waals EOS

  • ozgur(tr)
  • · Replies 6 ·
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6

Undergrad Ideal Gas Law - Real Life Question?

  • Monday
  • · Replies 3 ·
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3

Undergrad Understanding Boiling Point Elevation: Real Gas Law and Its Impact on Molecules

  • Biker
  • · Replies 3 ·
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3

Undergrad Heat transferred into a closed system

  • Axe199
  • · Replies 5 ·
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5

High School Pressure and temperature -- the effects of one upon the other

  • cGibson
  • · Replies 2 ·
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2

Undergrad How Does Newton's Third Law Clarify Force and Acceleration Misconceptions?

  • EddiePhys
  • · Replies 24 ·
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24

High School Why work done on a system causes heat to flow out of it?

  • sycircle
  • · Replies 2 ·
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2

Undergrad Inverse Square Law, Temperature Change, and Heat Source Temp

  • GvZ
  • · Replies 2 ·
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2

Undergrad Heat of Fusion for Hydrogen: Calculating Distance from 0.10 g Reaction

  • ckirmser
  • · Replies 24 ·
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24

Undergrad Why is entropy not reversible?

  • entropy1
  • · Replies 24 ·
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24

Undergrad Temperature of boiling surface

  • Yarbles
  • · Replies 32 ·
2
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32

Undergrad Calculating Temperature at a Distance from Heat Source

  • EasterEggs123
  • · Replies 5 ·
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5

Undergrad How to calculate heat released from friction

  • EasterEggs123
  • · Replies 2 ·
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2

Undergrad Different Blackbody Intensity Peaks, how do we measure it?

  • tade
  • · Replies 100 ·
4
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100

Graduate Is there a way to calculate the entropy change for an irreversible process?

  • goggles31
  • · Replies 3 ·
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3

Graduate Kelvin thermodynamics temperature scale

  • goggles31
  • · Replies 9 ·
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9

Undergrad Building a Vacuum Filling System: Valves & Fine Leaks

  • Adi Wijaya
  • · Replies 5 ·
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5

Graduate Physical Significance of Thermal Diffusivity

  • Soumalya
  • · Replies 7 ·
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7

Graduate Heat capacity at constant volume and internal energy

  • misko
  • · Replies 17 ·
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17

Graduate Heat equation from Navier Stokes eqns?

  • pyroknife
  • · Replies 7 ·
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7

Undergrad Why Does ds=dQ/T Measure System Disorder?

  • goggles31
  • · Replies 1 ·
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1

Graduate Heat transfer processes and reversibility

  • misko
  • · Replies 12 ·
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12

Undergrad Internal energy vs. Enthelpy vs. Entropy

  • ipocoyo
  • · Replies 1 ·
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1

Undergrad Energy needed for achieving this mass flow rate for a rocket

  • Basimalasi
  • · Replies 24 ·
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24

Graduate Does Entropy Change in All Adiabatic Processes?

  • robel45
  • · Replies 2 ·
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2

Graduate Water evaporation, temperature, wind and heat capacity?

  • Alfreds9
  • · Replies 2 ·
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2

High School Why a dust cloud does not obey pV=nRT?

  • fbs7
  • · Replies 11 ·
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11

High School Difference between albedo and emissivity?

  • NatFex
  • · Replies 1 ·
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1

Graduate Quasi-static and reversible processes in thermodynamics

  • misko
  • · Replies 1 ·
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1

Graduate Thermodynamics (Closed System) questions

  • Zero-shift
  • · Replies 1 ·
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1

High School Why Does My Vacuum Leak Rate Change at 25 Microns of Mercury?

  • kubaanglin
  • · Replies 14 ·
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14

Undergrad Converting between λ and ν for Blackbody Radiation?

  • tade
  • · Replies 6 ·
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6

Undergrad Black Body Radiator vs painted surface

  • Overflowing
  • · Replies 26 ·
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26

Undergrad Two blackbodies at two foci inside an ellipsoidal shell

  • particlezoo
  • · Replies 3 ·
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3

Undergrad Cooling/heating temperature rate change

  • Ihaveaquestion
  • · Replies 4 ·
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4

High School Why Absolute Zero is Independent of Substance Properties

  • alex36
  • · Replies 9 ·
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9

Graduate Understanding Entropy and Hawking Radiation in Black Holes

  • Stephanus
  • · Replies 2 ·
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2

Graduate Why does heat engine need to do negative work to surround?

  • lemd
  • · Replies 12 ·
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12

High School Which Cold Pack Solution Lasts Longer for Water-Cooled Vests?

  • gummby8
  • · Replies 6 ·
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6

High School Looking for resistivity vs. temperature lab charts

  • wondering12
  • · Replies 3 ·
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3

Undergrad Can solar panels be improved by combining them with a heat retaining material?

  • curiousQ23
  • · Replies 7 ·
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7

Graduate Can the weight of heat be accurately measured in such small increments?

  • alba
  • · Replies 12 ·
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12

Undergrad K Factor & Thermal Conductivity: Find Insulation Supplies

  • SBNY444
  • · Replies 1 ·
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1

High School Temperature increase with stirring?

  • Gabriele Pinna
  • · Replies 6 ·
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6

High School How can ice cool an alcoholic drink below 0°C?

  • stinsonbr
  • · Replies 163 ·
6
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163

High School Understanding the Science Behind Water Vapor and Cloud Formation

  • Edison Bias
  • · Replies 77 ·
3
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77

Graduate Temperature gradient vs thermal boundary layer thickness

  • Idrees Afridi
  • · Replies 8 ·
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8

Graduate Temperature: Intensive Property Explained

  • Esfand Yar Ali
  • · Replies 17 ·
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17

Undergrad Why must VTOL engines be larger than normal engines?

  • E'lir Kramer
  • · Replies 63 ·
3
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63

High School Colder bedrooms when outside is warmer

  • Althepump
  • · Replies 34 ·
2
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34

Undergrad Does any kind of polarized light transfer heat?

  • nazmus sakib
  • · Replies 6 ·
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6

Undergrad How to calculate the energy emitted through IR waves

  • amukher
  • · Replies 5 ·
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5

Graduate What happens to entropy when kinetic energy increases in a system?

  • befj0001
  • · Replies 1 ·
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1

Graduate General Relativity and Hawking Radiation at the Event Horizon

  • Chris11235
  • · Replies 4 ·
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4

Undergrad Harness Heat Energy for Drone Power - How To?

  • FeyStein
  • · Replies 6 ·
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6

Undergrad Does the Equal A Priori Probabilities Assumption Hold for Interacting Gases?

  • gonadas91
  • · Replies 3 ·
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3

Graduate Has anyone studied Equilibrium thermodynamics by CJ Adkin?

  • Nasbah BM
  • · Replies 9 ·
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9

Undergrad Ideal Gases: O2 & H2 - Kinetic Energy Comparison

  • MMS
  • · Replies 2 ·
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2

Graduate As water depth increases, does temperature go below 0C?

  • Octet
  • · Replies 1 ·
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1

Graduate Why can one calculate entropy change for thermal conduction?

  • Philip Koeck
  • · Replies 4 ·
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4

Undergrad 2nd law of thermodynamics -- why?

  • Einstein's Cat
  • · Replies 15 ·
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15

Undergrad Why can U be expanded in terms of T and V?

  • thegirl
  • · Replies 3 ·
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3

Undergrad Entropy or Quantum Mechanics ?

  • Peter25samaha
  • · Replies 7 ·
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7

Graduate CO2 sublimation in a closed container

  • Jonhorde
  • · Replies 3 ·
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3