Recent content by openbahr

I wasn't too concerned about the melting. I am just interested right now how long a cm would take. Sent from my iPhone using Physics Forums

Hey guys, I have a question... first some backround. I am asking this question is so I can build a backyard skating rink in the fastest way possible. I live in south Jersey so winter is allot of freeze/thaw. The common way for a backyard rink is 1) place a liner 2) fill 2-3 inches 3) let...

Sorry I was unclear. I did mean put piping on TOP of plywood in the ice. I was thinking of piping antifreeze through pipes and then through an ice filled cooler. Of course the outside temp would have to be pretty low. Is there a way to figure the highest outside temp could be for this to...

Ok, so my 8 year old son started playing ice hockey and unfortunately to get good, you need lost of ice time which is expensive and hard to come by. I am trying to figure out how to make a homemade ice rink this winter. I live in south NJ and the winters are not cold enough to have a lasting...

wow. thats impressive and very appreciated. I thank you for saving me the time. I don't think I could make a 1900 sq ft collector is there any way that a hommade solar heater could work? thanks again

so how does that apply in my problem Are you saying that it would raise the water temp 1 degree per second? I'm confused

well, let me pose this: when they say that a square meter of sunlight produces 1000 watts, do they mean per hour?? if so... then i guess i could deduct that if i had 1 sq meter of surface area exposed i would get 3413 btu's/hr and to raise my temp 1 degree ... 1 btu raises 1 lb of h2o 1 deg...

is dark matter a medium?

is no one up to the challenge??

and possibly enclosing in a glass topped box. i guess i need to know how much surface area collects how many btu's or watts and how much will be transferred into the water anyone??/

well... I was thinking of using half inch copper coiled pipe like you would find at home depot. I was going to paint it black. copper,because metal transfers heat better (I think) and black for obvious reasons. Half inch because I figured a smaller diameter pipe would put more water...

additional info I also have a gas heater that is 335,000 btu's but I want to use it as little as possible, as you could imagine. also about 25,000 gallons

hey guys, I am trying to figure out how many btu will be put out by a coil of copper pipe half inch by 20 feet painted black to heat my pool. Is there any way to figure this. I heard that a meter of sun produces 1000 watts but don't know how to figure