Recent content by erocored

That is how I understand curl: If I have a vane at some point ##(x,y)## of a vector field, then that vane will experience some angular velocities in points 1 ##(x+dx,y)##, 2 ##(x,y+dy)##, 3 ##(x-dx,y)##, 4 ##(x,y-dy)##. Adding those angular velocities gives me the resulting angular speed of...

Thank you!

Thank you! But is it correct that the Laplace operator is equal to the sum of these dashed lines, and if so, what does this sum mean?

Hello, I am sorry for my mistake. Here is what I meant exactly:I have vector ##\vec v_1## at point ##\left(x, y \right)## , vector ##\vec v_2## at point ##\left(x+dx, y \right)## and vector ##\vec v_3## at point ##\left(x, y+dy \right)## (##\vec v_1## = ##\vec F\left(x, y \right)##, ##\vec...

##\frac {\partial \vec F} {\partial x} ## + ##\frac{\partial \vec F} {\partial y} ## = vector which gives me a direction of the greatest increase of the greatest increase of the function, where ##\vec F ## = gradient of the function. If I multiple the first by ##\hat i## and the second by ##\hat...

I understand that dot product gives us a number and cross product gives a vector. Why is this vector orthogonal to the others two, and why it has magnitude |a|*|b|*sinΘ? How to use cross product? What does it give to us?

I know he had this ratio: But how did he get this: ?

I meant why CuSO4 does split into Cu and SO4?

What does break bounds in CuSO4? Is it just charge of the electrons in the left electrode? And why does the right electrode getting a positive charge?

Wikipedia says that they are the equivalents of momentum and force in rotational motion but I don't understand why this comparison is possible. The torque's dimension is N*m it seems like energy. What is this energy? Why angular momentum is not mass times angular velocity?

Is it possible that potential C > potential G?

Potentials in points E, F, A, B are equal because there is no resistance. In my opinion, losses of potential energy in the resitors R1 and R2 are not equal (potential C ≠ potential G). Then why do we say that voltage in this circuit is the same?

I think the current is the electrons that move because of potential difference. When electrons passing through a resistor they lose some of their kinetic energy. I guess that we can calculate common resistance by the sum of the resistance R1 and R2 because total less of energy wil be equal to...

Why is it possible?