There's a problem in my thermo class that I think I have the right answer for, but the value I get doesn't seem to make sense. The problem reads:
Warm air is contained in a piston-cyliner assembly oriented horizontally. The air cools slowly from an intial volume of .003 m^3 to a final volume...
Hey guys. I'm having trouble analyzing a part of this problem.
Two conducting, infinite sheets of charge (with thickness a) are fixed perpendicular to the x-axis as shown. The sheet from x = -2a cm to x = -a has a net charge per unit area -s and the sheet from x = +a to x = +2a has a net...
Hey I was wondering if anyone can tell me if i am doing this right.
f(x,y) = xy^2 ; R is the circular disk x^2+y^2<=3
So first i took the gradient, since I know a mix/min can exist if the gradient is equal to 0.
Gradient of X= y^s
Gradient of Y= 2xy
So the point (0,0)...
Hello, I was wondering if anyone can help me with this problem.
Show that the line with equation 2ax+2by=a^2+b^2
is tangent to the circle with equation 4x^2+4y^2=a^2+b^2
If this is true, wouldn't the derivative of the circle equation be equal to the first equation? Would I just take...
Well, you have a fairly basic question that comes from Netwon's second law of motion. By constant pull, the system has a constant force that is pulling the train along. This means that the system also has constant acceleration, which is given by Netwon's Laws.
F = M A
You can easily find...
Hello, I was wondering if someone could check and see that i did this problem right. You need to find the arc length of the vector from t=0 to 1:
r= <2e^t,e^-t,2t>
So first i took the derivative and got velocity.
v=<2e^t,-e^-t,2>
Next i used the formula for arc length.
arc...
Hello, I just learned how to do these types of problems, but I'm having trouble. Can some one direct me through this problem?
Find the point or points on the curve which the curvature is a maximum for
a. y=ex
b. xy=1
any help is greatly appreciated. I really am stuck here!
I am stuck on this question...can anyone help?
What is the pH after .10 mol NaCN is added to 100 mL of .050 M of HCN?
(Ka=6.0x10^-19)
I think I have to use the Henderson-Hasselbalch Equation. Is this the right way to take. And if so, how should I go about getting the ion concentration?
Hey, I was wondering if anyone can help analyze this problem with me. Here is the question.
A swing seat of mass M is connected to a fixed point P by a massless cord of length L. A child also of mass M sits on the seat and begins to sing with zero velocity at a position of which the cord...
i would find the volume of the damn using D=\frac{M}{V}
I'm not sure on that. Once you get volume,
do volume times density to get mass. Multiply mass by 9.8 m/s^2. I think that's it, but could be wrong.
It's really not necessary to use Simpson's Rule. Find an volume by cross-section. In order to do that, you need to develop an equation for the area, in this case a square. By the equations you gave, the length of one side of the square would be 4-[(x^2)-2]. Since the cross-sections are...
I think I made a little progress. After drawing a force diagram, I think I could say that the magnetic force = the x component of the force of gravity(i split gravity into components rather than anything else). so then i said that:
mg\sin{\theta}= \frac{B^2L^2v}{R}
and then solved for v...
Again, this is a problem I got in my AP Physics Class can anyone help? I would really appreciate any help. My teacher didn't explain this concept too well.
A metal bar with length L, mass m, and resistance R is placed on frictionless, metal rails that are inclined at an angle \theta...
Its ok, I found out how to do it. I forgot to mention that the Magnetic field has an initial magnitude of .750 T, and is decreasing at a rate of -.0350 T/S (there's your reason for changing magnetic flux) :approve:
Hey, I'm in a high school AP class and am stuck! Can anyone help me with this problem concerning induced emf? I would surely appreciate it.
There is a loop of wire, shaped like a square. Each side is 20 cm long.
There is a magnetic field directed into the page.
What would be the way of...
Hey, I'm in a high school AP class and am stuck! Can anyone help me with this problem concerning induced emf? I would surely appreciate it.
There is a loop of wire, shaped like a square. Each side is 20 cm long.
There is a magnetic field directed into the page.
What would be the way of...