Well yes actually, that is exactly the type of example I was thinking. In my case above, I don't see why the velocities must be the same. Is my case special in some other way that I'm not seeing?
I don't really know what this means. I'm 5 weeks through my first course in non-classical physics.
Hello all,
This post is in reference to a previous homework post, found here:
https://www.physicsforums.com/threads/show-that-f-gamma-3-ma.338744/
That thread is closed to further replies. Probably because it's nearly 10 years old.
That thread is about deriving relativistic force from the...
Hello all,
Thank you all for these immensely helpful suggestions. I appreciate the explanations and background. I will begin collecting some data (data that I will keep this time).
I'll report back, probably in spring.
Thank you all again.
Needless to say, I am very confused.
If there is a most appropriate way to measure total power from the generators, I can try to get additional hardware to do this. Please let me know. If any of you have resources to help me read and understand your comments further, I'm happy to do some...
My test rig applies heat from a hot water bath to one side and cold from a refrigerated bath to the other side. There's about 0.2 C variation from moment to moment. Because of this, by the time I disconnect vdc and connect adc, my delta T may change. Perhaps I'm better off with P = V^2/ R for...
Yes, those are the modules I am using.
Thanks for clarifying this. This is what I was doing originally before, but it didn't seem right when I thought about it.
Connecting a second meter to measure short circuit current along with open circuit voltage seems to change the reading. Considering...
Three modules:
1) 15.4 vdc, 30 amp max
2) 15.4 vdc, 10 amp max
3) 12 vdc, 5.8 amp max
I don't expect to reach the temperature difference where I will see these max values. One or two watts per module is probably realistic.
What do I use as a load? A simple resistor? I think Oxygen is saying the same thing below. Any good references for this method? Even a textbook chapter?
Thanks for your reply.
So, I should measure the resistance across my single module and use that resistance value when computing power for that single module? Will I also add the internal resistance of the meter from the spec sheet? If not, why not?
Hello all,
I'm using peltier modules (also called thermoelectric modules) for a student project. If you're not familiar, they are small semiconductor devices that when heated on one side and cooled on another, power flows due to the Seebeck effect.
I'd like to measure power coming from...