Recent content by brcole

Homework Statement A circular plastic disk with radius R = 1.80 cm has a uniformly distributed charge of Q = + 2.15 106 e on one face. A circular ring of width 30 µm is centered on that face, with the center of the ring at radius r = 0.50 cm. What charge is contained within the width of the...

Homework Statement If you find a mushroom, what is the chance that at least one more will be within one yard from it ? What is the chance that there is exactly one mushroom within the distance one yard from the point you stay? The mushrooms grow in a forest randomly , with density 0.5...

Homework Statement Determine all z ∈ C such that z^3-i = 0. Homework Equations z^3-i=0 The Attempt at a Solution z = -(i^3) = -((0+i)^3)

Homework Statement Lemma 1: Fix the circle C with center (x nought, y nought); y nought is greater than 0 and radius R is less than y nought. Consider two points P (x nought, y noight tilde) and P prime (x nought, -y nought tilde) which are symmetric with respect to x-axis by construcion...