I think the right solution is c). I'll pass on my reasoning to you:
R=6\, \textrm{cm}=0'06\, \textrm{m}
\sigma =\dfrac{10}{\pi} \, \textrm{nC/m}^2=\dfrac{1\cdot 10^{-8}}{\pi}\, \textrm{C/m}^2
P=0'03\, \textrm{m}
P'=10\, \textrm{cm}=0,1\, \textrm{m}
Point P:
\left.
\phi =\oint E\cdot...
I think the right choice is c. I'll pass on my reasoning to you:
We can think that if the formula of the potential is
V(r)=\dfrac{kq}{r}
If r tends to infinity, then V(r)=0.
But the correct answer is d).
I thought the right choice was d). But when it comes to the solutions, it is b) and I don't understand why.
My reasoning would be: the potential at a point is the work that the electric field does to transport a charge from infinity to that point, so if the field is zero, it does no work and...
When I try to do Gauss, the permeability is not always that of the free space, but it varies: up to a certain radius it is that of the void and then it is the relative one. How can I relate them? I'm trying to calculate the capacity of a spherical capacitor.
The scheme looks like this: inside I...
This isn't right, is it?
-\dfrac{GM}{R}+\dfrac12 v^2=-\dfrac{GM}{R+h}
v=\sqrt{\dfrac{GM}{R}}\left( 1-\sqrt{\dfrac{R}{R+h}}\right)
He's doing energy conservation. The mechanical energy at the Earth's surface is equal to the energy when the speed is 0.
Determine the volume of the shaded area around the Y-axis by using the theorem of Pappus Guldinus, where value of R = 143,3 cm.
a) Determine the area of the shaded section.
b) Determine the center of gravity of the shaded section.
c) Detrmine the volume by using the theorem of Pappus Guldinus...
Summary:: I'm solving an exercise.
I have the following center of gravity problem:
Having the function Y(x)=96,4*x(100-x) cm, where X is the horizontal axis and Y is the vertical axis, ranged between the interval (0, 93,7) cm. Determine:
a) Area bounded by this function, axis X and the line...
The load system formed by the point load and the load distribution generates two regions in space corresponding to r<1m and r>1m, i.e. inside and outside the sphere. Given the symmetry of the distribution, by means of the Gaussian theorem we can find the modulus of the field at a distance r from...
Homework Statement
We have a bicycle and lift the front wheel. And with the hand we apply a force of 10 N down and we turn the wheel. The wheel is 26 inches in diameter and weighs 1.5 kg. Find the angular acceleration, the torque of the net force and the angular velocity after a lap.
Homework...
Homework Statement
We have a transmission system (plate-pinion), with a 38-tooth chainring and a 14-tooth sprocket. The distance between the crank (between the chainring and the pedal) is 170 mm and the pedal is overloaded with 60 kg and pedalled at a speed of 70 min-1.
Homework Equations
P =...
Homework Statement
Hello, good afternoon,
I have a question that's coming up when I'm doing electromagnetic induction exercises. In some exercises they ask me to determine the electromotive force (iee), and when they do the exercise resolution they do it with absolute value. In other...
Homework Statement
In the circuit of the figure, determine the intensities I1, I2, I3, I4, I5 and the voltage Ug.
Homework Equations
Superposition and Kirchoff
The Attempt at a Solution
20-10I1+5I3-10I1=0
5I3+Ug+5I5=0
20I2+10I2-150=0
From the last equation, 30I2 = 150, I2 = 5 A
KNOTS...
Homework Statement
How can I calculate the initial phase in a simple harmonic motion if I only have the amplitude, frequency and angular velocity as data?
Homework Equations
The formula of the position, in fact they ask me to do the formula that allows to know the elongation depending on the...
Homework Statement
How could I get the distance traveled by a vehicle having only its constant acceleration as data?
Homework Equations
I know that the acceleration is the derivative of the velocity and the velocity is the derivative of the position.
The Attempt at a Solution
I don't know how...
Homework Statement
Determine the potential that creates an undefined cylinder of radius $R$ and density density $\rho$ that is uniformly charged.
Homework Equations
Gauss's law.
The Attempt at a Solution
I know that for this problem I can use gauss because it is a cylinder, now I do not get...
Hello,
Can not Gauss's Law be used to calculate the electric field generated by a uniformly charged finite thread?
I suppose it is because I can not consider the electric field constant (always going to the same direction), and for this I would have to do it by parts (the lateral flow, and the...