The following waveforms are measured through a particular device: v ( t ) = 10 cos ⁡ ( 300 t + 20 ∘ ) Vi ( t ) = 0.2 cos ⁡ ( 300 t + 45 ∘ )
Describes the complex power, what are A and θ? Enter A first, without units.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

a displacement distance is size of displ

what is the actual question though?