You must be kidding me, cubic feet per minute. So when the pressure is the same what force the movement of air does create? Do you know what does force mean? Do you know what does weight mean? I am afraid I am wrong. I am trying to speak physics on a science forum. The bird sits in the box: ↓ = Force of the box +↓ Force of the air sealed in the box+↓Force of the bird =3 Forces are applied to the scale The bird is hovering in the air: ↓ = Force of the box +↓ Force of the air sealed in the box+↓Force of the bird +↑Force of the lift applied on the bird = 2 Forces applied to the scale (↓+↑=0) What is more 3 or 2? How more simple could I make it? I am afraid I will get no answer from people who are educated only in science and who have no clue about physical reality around them.
I'm neither a physicist nor mathematician, if you want answers from one of those you are posting on the wrong forum. "Average pressure is 1 atm".. Think about it.
Don't make things up i didn't say. And I was already leaving. You have no idea what you are talking about and are just making things up as you go along. When you don't like the answers you get you change the questions. When someone disagrees you insult them. You are nothing more than a petulant troll.
Go troll in some other place if have nothing to contribute to the solution of the problem. Go troll in some other place when you don't even care what the problem is.
Yes, by E = MC^2 therefore deltaE = deltaM [C^2] - the added energy = added mass times the speed of light squared. What is really cool is how it happens. Temperature is a measure of the motion of the molecules. When you add heat, you increase their average speeds, which results in a relativistic mass increase of each molecule. So it's another application of Relativity.. Isn't that so cool you could just pop!
PS. The bird in a box problem used to be a standard test question for engineers getting their certification. I got it from my chem professor whose husband was an engineer. She got it from him. She never did say if he got it right or not. The shortest path is from thermodynamics. Since it's a closed system, the weight of the bird must be part of the weight of the box no matter what it's doing. That's why I specified that it's a sealed box.
It is really cool. Now we can solve all the problems. The weight of an object made of 100% copper is 1lb at 0F . Tell us what is the weight of the object at 32F. Or go away as a brainless troll. (It is not like trolls ever go away)
