(20%) Problem 3: Common transparent adhesive tape becomes charged when pulled fr

Question

(20%) Problem 3: Common transparent adhesive tape becomes charged when pulled from a dispenser. If one piece is placed above another, the repulsive force can be great enough to support the top piece's weight Assuming cqual point charges as an approximation, calculate the magnitude of cach charge, in coulombs, if the electrostatic force is grcat enough to support the weight of a 1.7 mg piece of tape held 0.85 cm above another. Grade Summary Deductions Potential q9.67742* 109 40% 60% Submissions Attempts remaining:3 coso tanO 789HOME sin cotan0a atan)acotan( asin)acos) 0% per attempt) detailed view 1|2|3| ? 20% 20% cotanh0) 0 END Degrees Radians BACKSPACE | DELI CLEAR Submit Hint I give up!

Explanation / Answer

F = W

where W= mg = 1.7*10^-6*9.81 = 1.6677*10^-5 N

where F= kq^2/r2 = 9*10^9*q^2 / 0.0085^2 = q^2 * 1.2457*10^14 N

So,  1.6677*10^-5 N = q^2 * 1.2457*10^14 N

So, q^2 = 1.3388*10^-9

So, q= 3.66*10^-10 C

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.