cowgiljl
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Posts posted by cowgiljl
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I have a dc motor and it is 800 hp. The problem is that it is pin firing under the brushes when i put it under load. We have turned the the comm,bought new brush holder & springs, also bought new brushes in thinking that they could have been of poor quality. We have also installed shimms under the poles pieces. After checking them the shims were the wrong thickness and not in the right order meaning alum, steel. Also notieced that 2 of the insulators were cracked and replaced. The neurtral was also adjusted.
any ideas?
It seems to be arcing on the trailing edge of the brush
1) I am thinkin of returning the comm
2) Removing shimms poles may be too strong
thanks joe
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H-C TRIPLE BOND C-H +Cl-Cl -----H-C = C=H
Cl Cl
Cl,Cl 240 KJ
C,H 411 KJ
Cl,C -327 KJ
SO the total is 324 KJ
Would this be correct?
Thanks
Joe
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Why are each of the following used as a reactant when testing for manganses in steel?
1) ammonium peroxydisulfate
2) Potassium periodate
3) Phosphoric acid
4) Nitric acid
5) Sodium bisulfite
I am still looking through my notes and my chemistry book but struggling in the class
thanks
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thank you so much because i am really having a time with this subject because the last math class (pre cal) i took over 5 years ago. and since then i decided to return and get my degree.
thanks again joe
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The question is
fine a equation f(x) that has a vertical asymptotes of X=1and X=3 and a horizontal asymptotes of Y=1
A) (x-1)(x-3) / y-1 = x^2-4x+3 / x-1
OR
B) (x-1) /(x-1)(x-3) = just the oppsite of above
is any of these correct?
I think B is correct but right now I can't find any info on it in my book
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Suppose a firm in a perfectly competive industry is producing a output of 10 units. The firms total revenue at this output is $80 and its total cost is $30. The firms marginal cost associated with the 11 unit of a output is $12. What can i say about an increase in production should it produce 11 unit or no
this is what i have
output TC MC
10 $30 $3 per unit
11 $42 $12 per unit
profit is $50
@10 units = 30/10 = $3
@11 unit = 42/11 = $3.80
it should not increase production because the cost more per unit to make
did i go about this right?
thanks joe
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A charged object has a mass of 9.11E-31 kg and a charge of 1.602E-19coul. Calculate the strength of the electric field that would provide a force to the weight of the charged object.
This is what I have so far
F = Ee/m 1.602E-19 * 1.6 E-19 / 9.11E-31 = 2.81E-8 N
is this correct
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A charged object has a mass of 9.11E-31 kg and a charge of 1.602E-19coul. Calculate the strength of the electric field that would provide a force to the weight of the charged object.
This is what I have so far
F = Ee/m 1.602E-19 * 1.6 E-19 / 9.11E-31 = 2.81E-8 N
is this correct
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i figureed it out
thanks
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the question is calculate the force (magitude and direction) on the -800nC
the -800nC is in the orgin
-y axis -200nC and is .02m from th e orgin
x axis -200nC and it is .06 from the orgin
now i labeled the starting from the -y axis q1, orgin q2 and the X axis is q3
F23 = 8.99E9 * -800E-9 * -200E-9/ .06^2 = .4 N Xvalue
F12 = 8.99E9 * -800E-9 * -200E-9/ .02^2 = 3.6 N Y value
F = squar root .4^2 + 3.6 ^2
f = 2.07 N
the direction tan-1 (3.6/.4) = 83.7 degrees below the X axis
are these correct
thanks joe
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I am new to this and i am struggling on this problem. i am also realy struggling in my circuits class
This is what i have so far the knowns
Vs= 50v
Vz = 10 v
Iz = 32mA
R1 = 1K ohm
Rl =? "potentmeter"
i just got the multisim program and could draw the cir if need be
R1 is in series with the source and the zener and rl are in parallel
it wants me to determine the range of Rl, Il, Vrl
I havew so far is 50 /1K = 50mA
Vrl = 10 v
I l = 50mA-32 mA = 18 mA
Rl = 556 ohms
is this correct and how would i go about finding the range of Rl
thanks joe
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pin firing under brushes on a dc motor
in Engineering
Posted
it is a 600 volt armature and the fields are 240 volts that would really be a big cap. I think the inpoles are too strong or the brush grade is to hard