Hi Bob,
Thanks a lot.
So if an radioactive isotope has a decay energy of 'a' and a life time in years 'b' does the flux equal the (decay energy * activity)/area it emits into. For some reason I am thinking that the decay energy is the total amount of energy it can give off. Am I right or is...
I don't have this book so I do not know how to apply this. How does it change if one is at sea level verses at high altitude where the air is thinner?
Also, why don't electron's compton scatter? I read that link posted above.
Thanks.
Ok so I know the decay energy of a radioactive source and the decay energy. I know the sources isoytopically emits into 4pi which means that it emits into a sphere. I want to know the flux at some radius r so is the energy per second divided by the total area of 4pir^2. That is assuming purely...
Hi,
If we calculate the flux at a certain distance from a source of radiation by first neglecting the effect of attenuation in air, how does one factor in the effect of air attenuation?
I do not know how to apply that theory. I'm am trying to understand what the difference is at sea level...
URGENT: PM Generator in Reverse
If you have a permanent magnet generator being driven by a turbine and the generator outputs some power level, how would the configuration of a generator change if it is suppose to drive a turbine's compressor stage with the same power?
I think the meaning is...
Hi,
I am working on a project and my friend said to me the gas turbine shaft power is 'x' amount of power. It is directly coupled to a generator so the power to the generator is the same 'x' amount of power.
How does that shaft power relate to the output of the generator? The shaft spins...
Hi,
I am having a hard time understanding the relationship between torque, angular speed, & required mass of an object. Angular accerlation notwithstanding.
Can someone help me understand how the ability of a machine to spin faster reduces the requirement for torque to generate a...
Yeah I think it is related to atomic packing factor from what I was reading. Atomic packing factor does relate to Electronic Structure, no?
Your starting to get me to understand. Let's take body centered cubic and face centered cubic. One has more of an atomic packing factor than the other...
First question, is atomic packing factor as described in wiki the same as fill factor?
If so, how does it relate to the conductivity? Does conductivity increase will the increase in atomic packing factor or fill factor?
I don't understand the relationship between conductivity and fill...
Help Fast! Change in mass of Water
Hi Everyone,
I kind of need some quick help. If I am at a high temp 'x' and a high pressure 'p' (above 100 C and 1 atm)
in a sealed container then the water will not be boiling. But let say that you open the top. Now the water is exposed to 1 atm and the...
Ok, I found this equation on wikipedia.
dV / Vo = 3*alpha* dT
T: temperature
V: Volume
It gives in a chart for water that 3*alpha is 207E-6 per C at 20 degrees C.
Does that mean that the change in volume (dV) will be 3*alpha*dT*Vo? That seems pretty linear.
The link here...
What is the equation for Water Expansion when ...
Hi all,
I know that water expands when heated above room temperature.
I just need to know what equations govern this expansion. For example, let's say I add x amount of heat, then water expands x amount.
Is it linear? Is there a...
I thought that since you are in a rigid container the heating of air results in the molecules separating (becoming less dense) and moving faster. Therefore increasing in volume and causing the pressure to increase.
To tell you the truth I really don't understand. I just keep reading...
Thermodynamics Help ... Understanding Controlled Mass/Volume
I don't understand the these processes. Please let me know if I am correct or not. If not, please correct me. Thanks.
From what I know, when you have a controlled volume process the pressure and temperature increase when heat is...