What is Energy balance: Definition and 69 Discussions
In biology, energy homeostasis, or the homeostatic control of energy balance, is a biological process that involves the coordinated homeostatic regulation of food intake (energy inflow) and energy expenditure (energy outflow). The human brain, particularly the hypothalamus, plays a central role in regulating energy homeostasis and generating the sense of hunger by integrating a number of biochemical signals that transmit information about energy balance. Fifty percent of the energy from glucose metabolism is immediately converted to heat.Energy homeostasis is an important aspect of bioenergetics.
finding the "energy balance" of a hydroelectric power generator
I proposed a new hydroelectric energy idea to somebody and they asked me for a "energy balance". I know nothing about physics or anything relevant to calculating something like this. If somebody asked you for the energy balance of...
This was a question from one of my tutes earlier in the semester, and now that I'm revising for an exam I can't seem to remember how to do it.
If anyone can help that would be great!
Sulfuric acid is a major bulk chemical used in a wide variety of industries. After sulfur is
oxidized to...
I need to do an energy balance on a heat exchanger where an aziotropic mixture of 90% methanol and 10% water at 21°C is being heated to 261°C. The heat source is high pressure saturated steam at 31 bar and it is assumed that the steam leaves as condensate at the same pressure (31bar)...
hello everyone,
In a hydraulic cylinder high amount of load is lifted by applying lower loads in smaller diameter side..
for example, if the diameters of two cylinders is 2cm and 4 cm and i applied a force of 10 N on the 2cm cylinder for 4m downwards. so now the 4cm diameter cylinder could...
Hi Guys, I was hoping someone would be able to help me with this integration. It's been killing me haha.
I've got this energy balance equation:
mgh = 0.5m(v^2) + 0.5I(w^2) + T(theta)
Basically, It's a gravitational potential energy that is converted to a velocity of a falling object...
I have argued with others on the Talk Polywell forum about the Nuclear Binding Energy per Nucleon vs the Total Nuclear Binding Energy per Nucleus graphs (which is the NBE/Nucleon * the atomic mass number). Despite referenced statements that, while the total binding energy increases continuously...
Homework Statement
Hello all, this is my first post and I'm hoping someone with more of a physics background can help me...
I'm trying to determine the energy absorbed by some opaque material at the bottom of a hole of uniform radius filled with fresh water. The hole is located within a...
Homework Statement
A piston-cylinder assembly contains water, initially saturated liquid at 150 degrees C. The water is heated at constant temperature.
a) if the rate of heat transfer to the water is 2.28 kW, determine the rate at which work is done by the water on the piston, in kW.Homework...
I am doing a problem about steam flowing through a nozzle. Here are the initial and final conditions..
P1=30 bar = 3000kPa
T1=320 C
v= 100 m/s
(v= velocity!)
P2=10 bar = 1000kPa
T2= 200 C
Mass flow rate = 2 kg/s (Steady flow process)
To me it seems like a cut and dry energy balance problem...
I am going over some thermodynamics right now and I am looking at the energy balance equation which is dE/dt = mdot*j(in) - mdot*j(out) + Qdot + Wdot(external)
I understand this means that the change in energy with respect to time equals the sum of the mass energy that goes into a system, minus...
Im having difficulty with question b in this problem:
[PLAIN]http://img705.imageshack.us/img705/9484/therm.jpg
Heres my attempt:
m(v1^2)*1/2)+h1)=m(v2^2)*1/2)+h2) + Qout
(v1^2)*1/2)+h1)=(v2^2)*1/2)+h2) + Qout
where v1 = 200ms^1
and v2 = 40ms^-1
and h1 = 3104.9kj/kg
And my answer is 22,000kj/kg...
I would appretiate help with the following 2 questions, I think I've got must of the first one right (Or went off t a tangent) but I don't now where to start on the second question
1a) Calculate the flue gas composition if 100 kmol h-1 of a gas whose composition is given below are burnt with...
Homework Statement
In this era of high energy prices, there is a focus on renewable sources of energy such as wind energy. Consider a large windmill 30m in diameter. On a windy day, suppose that the windmill entrains a stream of air 25 m in diameter at a speed of 14 m/s. Downstream of the...
I am curious. Maybe I don't understand something, but many articles I come across perform an energy balance on a solid and on a liquid.
**I assume evaporation acts on the remaining liquid and not directly on the substrate. Correct?**
They always include heat loss due to evaporation as...
A mass is winded via string aroung a flywheel and allowed to fall a specific height before detachement. The flywheel is connected to a small DC motor via gears and starts generating electricity once the mass is allowed to fall..
Now without the DC motor ( generator) the equation of energy...
My main question in order to solve this problem is...should kinetic energy be neglected? Ok, so here's the problem question:
Sea water with a density of rho = 1025 (kg/m^3) flows through a pump of 0.21 (m^3/s). The pump inlet is 0.25 (m) in diameter. At the inlet the pressure is -0.15 (m of...
I have this problem as a homework question for my MEB/Thermodynamics class and have been having some trouble with it.
A 10.0 m^3 tank contains steam at 275°C and 15.0 bar. The tank and its contents are cooled until the pressure drops to 1.2 bar. Some of the steam condenses in the process...
Given the equation Q* = QH + QE + QG and the corresponding data (all fluxes in [W/m²]). How can I find the equivalent loss of stored soil liquid water expressed in [mm] (Note: the conversion factor is the density of liquid water, i.e. 1000 kg/m^3)
Thanks very much for your help!:confused:
When we are playing bungy jump, we are instantaneous at rest at the bottom(K.E=0).
At that time, is elastic P.E. greater than gravitational P.E? :confused: