Heat and thermodynamics Definition and 59 Threads

Hi all! I am trying to solve a system of partial differential equations in Matlab, with both derivatives in time and space domains. I am using the pdepe function for that. The system is, to be simple, a sort of solar thermal panel, made of three layers: an absorber plate, a fluid layer of...

I am teaching myself thermodynamics (and really enjoying it!) but am slightly confused about Carnot's engine. From the equation efficiency=1-T(cold reservoir)/T(hot reservoir), I see that the most efficient engine is one where the difference in temperature between the cold and hot reservoirs is...

Homework Statement consider a horizontal cylindrical tube of cross sectional area A fitted with two frictionless pistons. The piston are connected to each other by an inextensible wire. Initially, the temperature of the gas is To and its pressure is Po which equals the atmospheric pressure...

consider a horizontal cylindrical tube of cross sectional area A fitted with two frictionless pistons. The piston are connected to each other by an inextensible wire. Initially, the temperature of the gas is To and its pressure is Po which equals the atmospheric pressure. Find the tension in the...

Homework Statement A person walks into a bar and orders a drink made of 1.5oz of rum, 4 oz of coke, and 3oz of ice. How long does it take the drink to reach the room temperature of 22 degC Homework Equations q=mcΔT q =mL where L is the latent heat of fusion ΔQ/Δt=k(Tf-Ti)/L The...

Okay, to give a little contextual background, for one of my units we have been given an abandoned town in south-west queensland (AU). It was inhabited by the natives for a while, then Australia was colonised, now no one lives there and there's a few garbagety buildings that are falling apart...

Recently in my physics class we covered heat and thermodynamics and I found the subject fascinating; however, given the pace of the course and breadth of material it must cover, I felt that the subject was given a shallow treatment (only covered elementary problems regarding the first law and...

how do you slove latent heat problems? also is there a easier way to slove thermodyamics problem? explain in a way a way that a 9th grader like me can understand. thanks

I have forgotten most of the formulea in Heat and Thermodynamics. I would appreciate if some one can check the following for me please. 1. A 2.2 Kg. block of ice melts to water at 0 degree celcius. By how much has the internal energy of the ice changed? Neglect the small change in volume. Q...