Recent content by ECU0406

i was able to find the resistivity of the material that i am using. (8.887*10^-7) but i am confused to what formula to use

i elaborated, everything should be there now

or do i mean convection?

what kind of heat exchange is there occurring between the wire and the water/alcohol? is it conduction?

the cooling system is very basic. it pumps water/alcohol to the top and it falls over the wire which are on rollers. the rollers are applying the current to the wire. hopefully soon enough i will know the percent alcohol content. R1/t1=R2/t2 R1 = .2414 ohms t1 = 23.8 Celsius R2 =...

what you were saying before along with Light_bulb about resistivity. i think this is what you guys are talking about: R2=R1·(1+α·(t2-t1)) α - temperature coefficient i have values for all the variables except for temperature coefficient and t2(which i am solving for) seems like...

our machine has a solution of alcohol and water falling onto the wire. other guys are working on measuring the percentage of each in the solution. if i can get the heat exchange coefficient for the wire i am using can i use that formula above? i have power going into the wire, the exposed...

i guess we can't attach excel spreadsheets which sucks but here it is in word. the conductivity formula is at the bottom. the quality guy here isn't any help. he's been here for 40 yrs and can't tell me how things work

wow thanks for new equipment. just curious what is the difference between "heat dissipation capacity" and "specific heat coefficient"? is one for how well it will release temperature and other how well it will storage energy or temperature?

has anyone seen conductivity in a percent? that is what the quality department uses and i need specific heat. any ideas? i tried to figure out the units but cant

i don't have the equipment to do that. can i just use specific heat? and put it in [energy in wire(Joules)]=mass*specificHeat*(change in temperature)

is the offset yield point just a straight line with the same slope but shift .002 strain over?

is there any way to actually test and find the yield point for any material? I am using a wire called DSC (Dispersion Strenghtened Copper). it starts off as a metal powder 99% copper, .5% alumin oxide, and the other .5% iron and lead. it also has a oxygen free copper cladding after the...

How accurate is the offset yield point theory? http://www.princeton.edu/~humcomp/sophlab/m&mgl_7.htm

i found this http://hyperphysics.phy-astr.gsu.edu/hbase/electric/restmp.html is that the way to use the thermal resistance coefficient to find the final temperature? do i measure the thermal resistance by heating it up with a certain # of amps and then see how long it takes the heat to...