"The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff." Carl Sagan, Cosmos

Hi, why is it that when saturated steam with a quality of 0.5 is isentropically expanded in a turbine, the dryness fraction increases slightly? Shouldn't it go down? Thanks

"Human thought must be supported by experiment; if it is not, it will distance itself from the truth farther than the Sun is from Earth" - Otto von Guericke

I own a natural skincare brand where most products contain just 2 or 3 ingredients. Our current process looks like this- • We melt hard oils/butters in a large oil melter • We dispense these oils into small bowls and mix with a liquid (carrier) oil • We let the mixture cool and we blend with a ha

Hi All I have an insulated composite wall. I know all of the thicknesses, K values and the inner wall temperature T1. How do I determine the outer wall temperature, T2, if I don't know the heat transfer rate Q? Thanks in advance for all of your help.

"Scientists discover the world that exists; engineers create the world that never was." _ Theodore Von Karman

Hello all, i hope you're having a nice day. I have a question about analytical heat transfer coefficient (HTC) calculation/determination for a rectangular duct curved in a circle. I have found some literature on this topic and also found empirical equations for rectangular cross section straight wa

What is the approaches that Stefan Boltzmann determined the constant sigma=5.6703×10-⁸(Wm-²k-⁴)? theoretical or experimental and how ?

The following derivation for the residual Enthalpy equation was provided to me by my Thermo professor. This derivation will be evaluated in our final exam. What I don’t understand is how step 8 is achieved. The professor explained this step on the board which is the scribbles you can see to the left

how much enthalpy does franci lose when he gets on the balanci for 34.4 minutes for a distance of 56 km and plays hardcore dnb.

With regards the following question: A cylinder fitted with a piston has a volume of 0.1 m3 and contains 0.5 kg of steam at 0.4 MPa. Heat is transferred to the steam until the temperature is 300 °C, as a result the volume increases to three times and the change in internal energy is 680.1 kJ. De

“Entropy is the price of structure.” - Ilya Prigogine

"It is not knowledge, but the act of learning, not possession but the act of getting there, which grants the greatest enjoyment." - Carl Friedrich Gauss

“A theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended its area of applicability. Therefore the deep impression which classical thermodynamics made upon me. It is the only physical theory of universal conte

Please, visit my website  https://www.granovskiy.com/ to know: 1). How to generate power from natural gas (methane) without greenhouse gas emissions; 2). How to generate power from low-temperature waste heat in a new way; 3). How to produce heat at a temperature higher than the temperature of

"Science replaces private prejudice with public, verifiable evidence."

I have a salt-water aquarium built into a dividing wall. it houses a 180-gallon display tank over another 180-gallon tank that houses the filtration. Each tank is 6'l x 2't x 2'w. and there is cabinetry on either side of the tanks. I have an exhaust fan at top of the cabinet that draws in air from t

“Energy is eternal delight” - William Blake

Ans: LMTD method can not be used unless all the temperatures at inlet and outlet of hot and cold fluids are known (or possible to calculate using energy balance equation).

Hi , I am new here and I don't have a strong background in mechanics or thermodynamics. I am just starting to explore this field. My problem is that I want to calculate the rising temperature of the liquid (lets just assume water, initial temperature 30℃) inside the tank while exposed to sunlight

"The laws of thermodynamics may be regarded as particular cases of more general laws, applicable to all such states of matter as constitute Energy, or the capacity to perform work, which more general laws form the basis of the science of energetics, a science comprehending, as special branches, the

“What has been affirmed without proof can also be denied without proof.” ― Euclid

Hello, I am a high school student who produces theoretical projects and presents them to 3rd party organizations. Recently I have been thinking about the inefficiency of “Steam Turbines”. As a solution to this, I thought that I could suggest using a different liquid instead of water, which is used i

"The Second Law of Thermodynamics defines the ultimate purpose of life, mind, and human striving: to deploy energy and information to fight back the tide of entropy and carve out refuges of beneficial order. An underappreciation of the inherent tendency toward disorder, and a failure to appreciate t

"The field of science is large; it is, therefore, impossible for any individual to cultivate the whole." - John Dalton

"None of my inventions came by accident. I see a worthwhile need to be met and I make trial after trial until it comes. What it boils down to is one percent inspiration and ninety-nine percent perspiration." - Thomas Edison

I recently wrote a book on thermodynamcics titled “Weber’s Thermodynamics Notes”. The book uses a different approach to explain thermodynamics for a beginner in the subject matter. The book is on Amazon but can be viewed for FREE on www.wrenchtime.com (click Thermodynamics). I would appreciate any