P is system pressure then?
I know that T and V changing does not imply that P changes. It just usually does when the system is not in mechanical contact with its surroundings.
So I'm guessing that (delta)H is only useful in a setup where the system is held at constant pressure? This...
I'm studying for the Physics GRE and going over my thermo notes.
Ok, so for enthalpy change
(delta)H = (delta) U + P * (delta) V
H is enthalpy, U is just proportional to T
What pressure are they talking about?
If the volume and temperature are changing, then the internal pressure is...
If the phone is not rotating, both accelerometers are going to be pointing in the same direction. So really, you have one vector you can work with, and that's the gravity vector. That means that if you tilt the phone vertically in x/y/z (like the difference between you holding the phone to...
Current: depends on the context. In the general sense, vector. Because we have charge that can flow at any rate in any direction. However, if you're dealing with circuits, where you know the direction (it's only flowing along the wire) then it's fine just to specify the magnitude. Usually in...
Any time something hard hits something else hard it deforms and vibrates. If this vibrations is an audible frequency you hear it. When you have a gear box and motor there are a lot of hard things hitting each other all the time. So pretty much any thing that moves enough, like the pump in a...
keep in mind where the ground is. If you're starting at ground level and shoot horizontally, you're never in the air so time of flight is zero.
If both of them start at some height h, then the horizontal one lands first. Your airtime is only determined by the y position and velocity...
I'm trying to comprehend a paper I'm supposed to summarize
this one:
---ok it won't let me post urls---- whatever
My question, is what is the deal with photoinduced absorption spectroscopy? I gathered that it involves a "pump" (burst of light) striking the sample and then a "probe"...
I guess this would go under chemistry. At least I leared what thermodynamics I know from my chem class.
Here's the situation: My dad wants to know if the decreacing water level in the jacuzzi is due to a leak or evaporation. The pool guy told us to fill up a bucket with water and compare...