Recent content by kkingkong

Homework Statement What is the null space of this matrices. |1 1 0 3 1| |0 1 -1 0 1| |1 1 3 0 1| The Attempt at a Solution I reduced it to rref using agumented matrice(each one equals to zero ) |1 0 0 4 0 0| |0 1 0 -1 1 0| |0 0 1 -1 0 0| and i get get x1=-x4 , x2= x4...

A 9.08 microFarad capacitor is measured to have a reactance of 245.0 Ohm. At what frequency (in Hz) is it being driven? I converted 9.08microFaraad in farads- 9.08x10^-6 THe formula i used was 1/(2*pi*f*9.08X10^-6) -- f = 17528.07 Hz but i am not sure if this is the right answer.

oh thank you after i include B i still get the wrong answer. i get 2.68E-22

Homework Statement Calculate the magnitude of the force on an electron moving at 4×10^6 m/s at an angle of 8 degrees to a magnetic field of 0.3 Tesla. Give your answer in Newtons. Homework Equations the equation that i used was f= qvBsin(8) The Attempt at a Solution...

Capacitor energy problem?? Homework Statement A capacitor in this device is charged to 6417.0 V and stores 208.0 J of energy. What is its capacitance? Homework Equations i know the equation but dnt know how to use it . . C=(kEoA)/d The Attempt at a Solution I don't know how to...