Recent content by Damascus Road

Really, I don't even need to work with real specific heats and masses... all I really care about is comparing the time of the device sitting at exactly 40, vs. the time when we start at temperatures of above 40, which would result (I think) in a fraction of other result.

Thanks! it's been a while since I took a thermal course... I believe I should be able to use this to add in more oven points as well without error, yeah? What I want is to have several temperature set points to minimize the time.. so I might start at 60 for 10 minutes, move to 50, move to 45...

I can estimate the surface area, yes, and liquid isn't an option. Since this is an electronic device, there are several temperature sensors within the device that are read, so when they stop fluctuating and remain fairly constant, thermal stability is reached. Also, the air of the oven blows at...

apologies. you are correct, rapid thermal stability is what I am actually after, and it is essentially being heated or cooled in an oven. The object being heated or cooled is an electronic device comprised of many different materials; metals, glass, electronics, and more. Is there anything I...

Hello all. Been a long time since I took a thermal course. I'm looking for a formula to work with the thermal stabilization of something. Specifically, I want to minimize the time required for thermal stabilization to occur and how to mathematically calculate what that set temperatures should...

2 points x and f(x) and not just one (x,y) ?

Let f: X \rightarrow Y be a function. The graph of f is a subset of X x Y given by G = {(x,f(x) | x \in X } . Show that if f is continuous and Y is Hausdorff, then G is closed in X x Y. Any tips on how to start? Is it saying that f: X \rightarrow Y = G ?

Greetings all, doing more problems for my test tomorrow. I'm not sure how to start these two.. 1.) I'm trying to show that if X and Y are Hausdorff spaces, then the product space X x Y is also Hausdorff. So, I know that I must have distinct x1 and x2 \in X, with disjoint neighborhoods U1...

Here's two more question I'm working on in test prep. 2.) Let Y = [-1,1] have the standard topology. Which of the following sets are open in Y, and which are open in R. A= (1,1/2) \cup (-1/2,-1) B= (1,1/2] \cup [-1/2,-1) C= [1,1/2) \cup (-1/2,-1] D= [1,1/2] \cup [-1/2,-1] E= \cup...

Ok thanks, I'll start another one :) :)

You don't think so many threads will annoy people? I don't want to make people mad and turn them off from helping :(

But are those open intervals also circles?

Open intervals on the real line?

Greetings all, I have a test upcoming next week and a lot of problems to solve. I asked in a previous thread whether or not I should just continue to adding to the thread and it seems the answer was yes. I appreciate any help! This is a tough subject. Anyways, the first one I'm working on. I...

lol, doh. My brain was thinking zero, and my fingers typed empty set. I'm going to go teach them a lesson, thanks very much! I'll probably end up posting with other questions from this assignment :P