The main subject of it is about cable shielding in electromagnetic compatibility. I've googling myself but nothing much info about it.
I got some answers from german , after translate is something like this ( dotn know correct or not ):
1. reflection produces ripples
2. to against strong...
HI,
I got some questions regarding Electromagnetic Compatibility:
1. When we measure transfer impedance for cable shielding , why we have assume that lamda >> L ?
2. What is the difference between trasnfer impedance & admittance?
My friend told me that the impedance in purely...
hi,
I spray with my keyboard with Spray paint ( i think is enamel paint ) and now i am regret - so i need a solution to dissolve it but i can't remember the name , can anyone tell me ? thanks
energy is conserved ???
hi,
just read about energy conservation but i am not so clear about it .for example : a particle moves in uniform oscillation electric field - does the energy conserved ?
what is the criterion for conservation energy?
thanks
My thought : angular momentum of z component and the energy of the system is conserved ... Pls tell me if there are more quantities are conserved
thanks
hi,
if i have mass possess potential U(x)=-Gm1m2/(x^2+y^2+(kz)^2 )^1/2 , i said angular momentum of z is conserved but not angular momentum of x , y .. is it correct ?
what else is conserved ? energy ?
hi,
i read lots of book regarding fictitious force - coriolis and centrifugal forces, but i am not clear how to determine the direction of the force..
example. if we throw a ball vertical up , how we can know the deviation from the original position ( from book we know that if the ball...
ya, i dont know is right or wrong -
dv/dt= qBv/m -kx
but the spring's motion is in x y plane ( if z is magnetic field) - how can i decribe the force cause by spring ?
hi,
got a difficult question to ask :
we can easily find the motion of charge in magnetic field.But now if the charge is attached to a spring, how can we find the general motion ?
is it like a gyroscope ?
thanks
hi,
what is difference between Centripedal & Centrifugal ? One is in inertial frames and the other in rotating frames? one is 'true' force and the other is fictitious force?
thanks
Are you in inertial frames???
hi, today my friend ask me 2 simple questions, too shame i cannot answer him...so i post it here:
is the classroom an inertial system ?? earth is rotating around the sun - so ...can still consider as inertial ?
2. If u working in laboratory to find so...
i will consider both conditions .. if the initial velocity is not too high - then is propotional to v , if not ( high velocity ) then is proportional to v^2...
i got a long a strange solution for max height...
hi,
If we throw a ball vertical upward, we can easily find the maximum height if ignore the friction..
So if we switch on the friction, how can we find the max height ?
hi,
i got a algebra question regarding kernel
1.what is the kernel of intergration operator:
T(p)= p'(x)?
2. what is the kernel of differentiation operator :
T(p) = integration of p(x) from -1 to 1
thanks
determine following setd of vectors in F(-infinitity, infinitiy) are linearly independent (using appropriate identities)
0, [cos (pi*x)]^3 , [sin 3*pi*x]^5
pls help !