Delta FUNCTIONS AND CHARGE DISTRIBUTIONS On the previous homework we had two poi

Question

Delta FUNCTIONS AND CHARGE DISTRIBUTIONS On the previous homework we had two point charges: +3q located at x=-D, and -q located at x=+D. Write an expression for the volume charge density p(r) of this system of charges. On the previous homework we had another problem with a spherical surface of radius R (Fig 2. 11 in Griffiths) which carried a uniform surface charge density sigma. Write an expression for the volume charge density p(r) of this charge distribution. (Hint: use spherical coordinates, and be sure that your total integrated charge comes out right. ) (Verify explicitly that the units of your final expression are correct) WidgCo is a company that produces and sells widgets. The marketing department determines that the price per widget (p), measured in dollars, and the daily demand for widgets (x) are related by the following demand equation: p(x) = 300- 6x. Find WidgCo's maximum daily revenue. A. $5, 144 B. $3, 750 C. $4, 402 D. $ 3, 245 E. $2, 387 F. $2, 813 WidgCo is a company that produces and sells widgets. The marketing department determines that the price per widget (p), measured in dollars, and the daily demand for widgets (x) are related by the following demand equation: p(x) = 624 -8x. The cost of producing x widgets is given by the function C(x) = 1150+80x. Find WidgCo's maximum daily profit. A. $12, 951 B. $12, 168 C. $ 13, 713 D. $ 8, 608 E. $10, 167 F. $8, 098

Explanation / Answer

Q8) D. $3245 Q9) B. $12168

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