Thermodynamics Forum

Post thread
Undergrad Calculating time for temperature to change in room
  • · Replies 12 ·
Replies
12
Views
15K
High School Friction and the third law of motion
  • · Replies 11 ·
Replies
11
Views
2K
Graduate Non equilibrium thermodynamics: T as a function of time
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Heat engine that violates Second law of thermodynamics?
  • · Replies 17 ·
Replies
17
Views
5K
Graduate How does the universe so conspire that entropy increase?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Is this a new and useful source of energy?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Question about energy (explosions)
  • · Replies 5 ·
Replies
5
Views
2K
High School Microwave oven radiation danger
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is this a possible idea for an antimatter rocket engine?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Can a Vortex Tube Be Reversed to Generate Compressed Air?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Thermal Expansion of Two Holes
  • · Replies 19 ·
Replies
19
Views
6K
High School Violation of Newton's third law
  • · Replies 7 ·
Replies
7
Views
3K
High School I'm Looking to Make a Very Small "Nearly Lossless" Machine
  • · Replies 13 ·
Replies
13
Views
2K
Undergrad Massflow are caulucation for fuel(Diesel)
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Formula for Evaporative Cooloer (Swamp cooler)
  • · Replies 1 ·
Replies
1
Views
4K
Undergrad Kitchen Condensation: Explaining the Science Behind It
  • · Replies 6 ·
Replies
6
Views
5K
Graduate Work on the Entire System in Thermodynamics
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad First law of thermodynamics at constant volume (ideal gas)
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad How much energy transferred when we burn a piece of wood ?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Thermal Radiation: Calc Total Emitted Joules in Certain Temp Range
  • · Replies 32 ·
2
Replies
32
Views
3K
Graduate Possible to derive Boltzmann distribution using W, not lnW?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Piston Thermodynamics: Understanding Pressure and Temperature Changes
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Internal Energy Dependence for a Fixed System in Fixed Phase
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Derivation of Helmholtz Energy Minimum in Thermodynamics
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Rocket Specific Impulse vs Jet Engine Specific Impulse
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Can Batteries Charge Faster if Properly Cooled?
  • · Replies 26 ·
Replies
26
Views
4K
Undergrad Boiling 1.5L Water to 55C: 50C → 55C
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Gas Law Calculation: Pressure Effects of Temp from 17-22C
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad Want to Calculate Volume, Given Time, Temperature & Energy
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Various ways of doing work to minimize entropy increase
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad What is the Physical Interpretation of Entropy?
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Temperature increase with pressure in an open vessel?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Are heat radiation and absorption symmetric?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad What is the temperature of an iron bar after 1 hour of convection heating?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad How are different forms of energy come into existence?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Deviation from Raoult's Law--Smith Van Ness Abbott
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Temperature increase by light absorption
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Boltzmann Equation: Entropy & Thermodynamics
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad How to apply the Clausius-Clapeyron to geysers
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Ion density in sheath of Langmuir probe in plasma
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad How Does Room Temperature Affect Air Molecule Energy from Winter to Summer?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Thermal conductivity air to metal
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad What are the attractive forces in a neutral fluid?
  • · Replies 4 ·
Replies
4
Views
1K
Graduate Microcanonical ensemble question
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad How can the effect of air temperature on an object be quantified?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Heat of friction in cylinder-piston
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Can temperature affect the mass of water
  • · Replies 6 ·
Replies
6
Views
6K
Undergrad Gibbs Free Energy for non-standard conditions
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Is a heat vs Mu chart Misleading? What factors into Mu? (brake pads)
  • · Replies 2 ·
Replies
2
Views
7K
Undergrad Does weight / inertia / momentum change with temperature?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Newton's second law dp/dt version?
  • · Replies 5 ·
Replies
5
Views
5K
Undergrad Understanding the Carnot cycle
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Temperature in Constant volume gas thermometer.
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Increase temperature of liquid in a box without heat convection or conduction
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Combustion Engines: Anatomy, Benefits & Energy Source
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Why is the internal energy change of free expansion 0?
  • · Replies 7 ·
Replies
7
Views
5K
Graduate Ideal Gas Law Equilibrium Requirements
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Defining Entropy on a Rubik's Cube: Insights and Implications
  • · Replies 6 ·
Replies
6
Views
4K
Graduate Can We Create a More Efficient Engine Than the Carnot Engine?
  • · Replies 23 ·
Replies
23
Views
4K
Graduate Downgoing & Upgoing radiant heat equally reflected by RB?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Physical significance of Enthelpy
  • · Replies 1 ·
Replies
1
Views
4K
Graduate How Do We Calculate Entropy Change for Non-Isothermal Points on a PV Diagram?
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Blackbody Radiation: Max Intensity & Freq, Invisibility in UV Region?
  • · Replies 1 ·
Replies
1
Views
1K
High School Object Gains Heat: What Does it Mean?
  • · Replies 8 ·
Replies
8
Views
2K
Graduate How Is Entropy Measured in Thermodynamics?
  • · Replies 12 ·
Replies
12
Views
5K
Undergrad How was the van der Waals equation derived?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Ideal gas law: can you use it to find P during exsolution?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Is the energy output of an engine constant?
  • · Replies 31 ·
2
Replies
31
Views
6K
Undergrad Thermal Expansion of piano wire
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Why Does Iron Have a Higher Molar Specific Heat Than Its Debye Value?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Vaporization and Energy absorption
  • · Replies 2 ·
Replies
2
Views
2K
High School I want to know the differences about isothermal process.
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Considering Enthelpy Change when external pressure changes
  • · Replies 8 ·
Replies
8
Views
4K
Graduate Why do phase trxns behave differently than chemical rxns?
  • · Replies 23 ·
Replies
23
Views
3K
Graduate A Hypothetical Situation Involving Gases
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Rate of heat transfer/temperature change
  • · Replies 9 ·
Replies
9
Views
2K
High School Bunsen burner flame gets colder with air hole fully open
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is an adiabatic process possible for an open system?
  • · Replies 4 ·
Replies
4
Views
8K
Undergrad Prediction of Newton's third law
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Thermodynamics - does homogeneity follow from additivity?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Help? trying to solve an energy problem?
  • · Replies 6 ·
Replies
6
Views
1K
Undergrad Thermal Equilibrium: How Objects Reach Balance
  • · Replies 3 ·
Replies
3
Views
3K
High School Which Color Provides the Best Green House Effect for Pool Solar Covers?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Radiation - mode of heat transfer
  • · Replies 6 ·
Replies
6
Views
3K
Graduate General dipole radiation far field equation
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Photons emitted by heated objects
  • · Replies 3 ·
Replies
3
Views
1K
High School Frequently Made Errors in Heat - Elementary Level - Comments
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Are there any relations between entropy and force?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Max PSI Before a Certain Temperature is Reached
  • · Replies 7 ·
Replies
7
Views
2K
Graduate What is the entropy of weak and strong force?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Why dU may not equals dW in free expansion?
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad How long does soil take to heat up
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Thermal Physics: Cooling by both Conduction & Convection
  • · Replies 16 ·
Replies
16
Views
2K
High School Energy for heating the air to a specific temperature
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Heating a Nichrome wire around a glass tube
  • · Replies 3 ·
Replies
3
Views
4K
High School What to use when equations require mass but given a volume ?
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Temperature of a gas in a container
  • · Replies 1 ·
Replies
1
Views
1K
Graduate How much an unsealed piston will compress air
  • · Replies 14 ·
Replies
14
Views
3K
High School (simple) Applying constant force - Newton's first Law
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Using Laminar Flow to measure Thermal Conductivity
  • · Replies 1 ·
Replies
1
Views
1K