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I need help Brain power might be needed
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I need help Brain power might be needed
daz, does anyone who helps you get graded for there work and get another qualification?
does anyone want to do my level 4 nvq for me :idea:
does anyone want to do my level 4 nvq for me :idea:
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OP
afraid not
post some questions up of the nvq
post some questions up of the nvq
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OP
lol
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new question what are
beijing spare ribs
i lvoe em i just want to know what they are
beijing spare ribs
i lvoe em i just want to know what they are
they're just normal spare ribs with a chinese marinade sauce.
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if you sprinkle a little bit of sauce on my ribs you can creat them as you can see them on my stomach :devil:
try half a dozen pints and pies every night for a month, that should get you into shape.
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Jug can i have more help for the M3 questions just the equations
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Hate to bump but im rather struggling i have got a extention to 5 tonight
ok looking at it quickly; the water absorbs 50% of the output power, the output power was 20kw @ 300l/h, water goes in at 15C, what does it come out at?
this needs the Q = MC (t2-t1) formula (i guess)
we dont know t1 (final temp), but we know
t2 is 15
C is 4.18 (spec heat of water)
Q is 10kw.
M is the mass , so a flow of 300l/h = 300kgs
so; 10 = 300*4.18 (15-t1)
10 = 1254 (15-t1)
10/1254 = 15-t1
10/1254 + t1 = 15
t1 = 15 -10/1254
t1 = 15 - 0.008 = 14.992
hang on that cant be right, i made a mistake when calculating M, maybe it should be kg/s per second not hour, i cant remember.
i'm going toilet, give me 2 mins.
this needs the Q = MC (t2-t1) formula (i guess)
we dont know t1 (final temp), but we know
t2 is 15
C is 4.18 (spec heat of water)
Q is 10kw.
M is the mass , so a flow of 300l/h = 300kgs
so; 10 = 300*4.18 (15-t1)
10 = 1254 (15-t1)
10/1254 = 15-t1
10/1254 + t1 = 15
t1 = 15 -10/1254
t1 = 15 - 0.008 = 14.992
hang on that cant be right, i made a mistake when calculating M, maybe it should be kg/s per second not hour, i cant remember.
i'm going toilet, give me 2 mins.
DUH i just realised i had C in the wrong units (been a very long time since i did this so bear wiith me)
we dont know t1 (final temp), but we know
t2 is 15
C is 4186 J (spec heat of water)
Q is 10kw.
M is the mass , a flow of 300l/h = 300kgs/hour = 0.083kg/sec
so, 10 = 0.083*4186 (15-t1)
10 = 348.83 (15-t1)
10 = 5232.45 - 348.83t1
10 - 5232.45 = -348.83t1
-5222.45/-348.83 = -t1
t1 = 14.97C
hang on that cant be right, it cant lose heat.
oh WTF :bang:
we dont know t1 (final temp), but we know
t2 is 15
C is 4186 J (spec heat of water)
Q is 10kw.
M is the mass , a flow of 300l/h = 300kgs/hour = 0.083kg/sec
so, 10 = 0.083*4186 (15-t1)
10 = 348.83 (15-t1)
10 = 5232.45 - 348.83t1
10 - 5232.45 = -348.83t1
-5222.45/-348.83 = -t1
t1 = 14.97C
hang on that cant be right, it cant lose heat.
oh WTF :bang:
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OP
OP
You mixed up t1 and t 2 me thinks
t1 should be initial
t1 should be initial
wait i used a 1 hour Q and a 1 sec M, lets try it again using both at 1 hour;
we dont know t1 (final temp), but we know
t2 is 15
C is 4186 J (spec heat of water)
Q is 10kw.
M is the mass , a flow of 300l/h = 300kgs/hour
so, 10 = 300*4186 (15-t1)
10 = 1255800 (15-t1)
10 = 1883700 - 1255800t1
10 - 1883700 = -1255800t1
-1883690 / -11255800 = -t1
t1 = 0.16C
no that cant be right either. oh bollix to it i give up, i know its my C or M that is wrong, i suspect M, but i dont know, let me know when you find the answer otherwise it will bug me.
we dont know t1 (final temp), but we know
t2 is 15
C is 4186 J (spec heat of water)
Q is 10kw.
M is the mass , a flow of 300l/h = 300kgs/hour
so, 10 = 300*4186 (15-t1)
10 = 1255800 (15-t1)
10 = 1883700 - 1255800t1
10 - 1883700 = -1255800t1
-1883690 / -11255800 = -t1
t1 = 0.16C
no that cant be right either. oh bollix to it i give up, i know its my C or M that is wrong, i suspect M, but i dont know, let me know when you find the answer otherwise it will bug me.
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OP
at least i got the formulea
you may be right!
you know i think i did mix up t1 and t2, and i'm going to trust my gut instinct about C and M, so lets try again.
we dont know t2 (final temp), but we know
t1 is 15
C is 4.18
Q is 10.
M is 300
so; 10 = 300*4.18 (t2-15)
10 = 1254 (t2-15)
10/1254 = t2-15
10/1254 +15 = t2
t2 = 15.00797C
that cant be right, its possible, but i get the feeling i have done something wrong with M or C so the units are not correct, which is why the temp change is so small. sorry i really am giving up now. :bang:
we dont know t2 (final temp), but we know
t1 is 15
C is 4.18
Q is 10.
M is 300
so; 10 = 300*4.18 (t2-15)
10 = 1254 (t2-15)
10/1254 = t2-15
10/1254 +15 = t2
t2 = 15.00797C
that cant be right, its possible, but i get the feeling i have done something wrong with M or C so the units are not correct, which is why the temp change is so small. sorry i really am giving up now. :bang:
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WAIT!!! 1lite of water doesnt weight 1kg, thats a rooky error, 1litre is 0.96kgs.
we dont know t2 (final temp), but we know
t1 is 15
C is 4.186
Q is 10.
M is 300*.96= 288
so; 10 = 288*4.186 (t2-15)
10 = 1205.568 (t2-15)
10/1205.568 = t2-15
10/1205.568 +15 = t2
t2 = 15.0083C
i'm gonna say thats my final answer (but still think i got M or C wrong)
we dont know t2 (final temp), but we know
t1 is 15
C is 4.186
Q is 10.
M is 300*.96= 288
so; 10 = 288*4.186 (t2-15)
10 = 1205.568 (t2-15)
10/1205.568 = t2-15
10/1205.568 +15 = t2
t2 = 15.0083C
i'm gonna say thats my final answer (but still think i got M or C wrong)
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i got 43.678 using formulea and some other numbers but since plagerism isnt allowed i shall pm you details later when i done second half
