Chicago IL here, constant 33 deg F. The tub is indeed 130gal with a nice insulated top. It's been rising steadily every hour. 51-53-55-56-59
Thanks for all the helpful info!
Thanks dave! Yeah I popped a thermometer in it when I first turned it on. The initial water temp was 51 degrees. It is now showing 53ish degrees and has been exactly 1 hour. The outside temp is 33 degrees. There are quite a few variables that could influence only a few degrees of change, yet...
I'm not sure how much heat it's supposed to dissipate nor can I readily measure the amperage. I know it is a 1kw heater...
Here is the actual diagram. The section labeled 1 represents the 12" long heating tube, that is the heating element itself. Water rushes through it. That tube is cold to...
Curious question, figured what better place to ask than the physics forum.
So I just picked up a used hot tub. Was running great when I bought it. Filled it up with water, turned it on, started its cycle. It can take over 24 hours for the tub to reach 102 degrees.
There's a 12 inch...
I thought that originally... yet the next one shows investing $2000, and $150 year for 6 years (salvage value of 2700). The rate of return is shown at 11.8%, which throws off my initial logic... hence my confusion.
I'm not sure how to implement the salvage value, etc.
I'm reading an example in the book, and I simply can't wrap my mind around it...
It's claiming you invest $1000 and get back $150 per year for 5 years. At the end of 5 years the salvage value is $1000 (if that matters).
It claims the Rate of Return is 15%, yet for the life of me I can't...
Gotcha yeah, that makes sense. I suppose it wouldn't be completely incorrect, yet not properly done. Anyway I'll find out soon enough.
Thanks for your help!
Yes I understand that, my question is, must I?
I recently took a test, and after looking through the examples, they set the constraints equal to 0 and isolated all the variables to one side. I left the constraints with variables on both sides. Not sure if I would get points off for doing so...
I'm sorry, it was late and my examples are horrible. They do not confine to standard constraints, they were simply just numbers to illustrate.
The basic question is, can you have variables on both sides of a constraint? Or must the variables be confined to one side?
Homework Statement
I don't exactly have a specific example, I'm looking for the general idea behind LP constraints.
Homework Equations
Within the constraints, do the variables have to be all to one side?
For instance, X1 + 2 > 3 is a standard constraint
would for example
X1 + 2 > X1 + 1...
Would a ball dropped vs launched(horizontally) have the same force of impact? (same starting height)
I can't wrap my mind around this... I know there's no acceleration in the x-direction, yet I would imagine the launched object would have a greater force of impact. (negating the ball rolling...
Quite confused. I've read the book/online definitions yet I suppose I may need a simpler explanation.
Lets say I have a table of x y values.
x 1 2 3 4 5
y 6 7 8 9 10
how would I carry out the linear least squares fit of the data to determine the slope and y-intercept?
Yeah I was simply going along with a helping answer from someone else, I'm not sure why I followed it and included the bet money.So to re-do the work:
Lets say you put in $20 each time and there are 2 different systems. (10 times each)
Method 1 would give 5 wins/5 losses.
5 wins at $20 per...
Alright, my brains a little shot right now so I need some help. I've been studying the Casino game of Roulette and I was curious how this idea would work out.Lets say you put in $20 each time and there are 2 different systems.
1st way: 50% chance to win back what you put in. So your original...
THANK YOU!
You're right I don't know what I was thinking, I have to link the two together.
And the random_number issue was because I didn't call "random_seed" before it. Unrelated.
Thanks again for all the help!