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1 Oct 2019

If you comb your hair and the comb becomes positively charged, then your hair becomes

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Sixta Kovacek
Sixta KovacekLv2
1 Jul 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

An astronaut performs a simple experiment in the"weightless"environment of a space station, intended for televisionbroadcastto elementary school classrooms around the world. Bycombing herhair, she is able to charge a flat comb so that, in thevicinity ofthe comb, there is an approximately uniform electricfield ofstrength E=900 N/C. She places the comb 4.00 cm away from aclumpof small paper dots, inducing a nonuniform distribution ofchargein the clump so that one of the dots becomes charged andbreaksaway, accelerating toward the comb. If the paper dot has amass of2.95x10-4 kg and a charge of magnitude 3.50μC,howfast is it going when it strikes the comb?
I know I need to find the final velocity. I believe theformulaI need to use for this is: vf2=vi2 + 2aΔx. My question is: how do Ifind thefinal velocity of the paper dot traveling toward thecomb?

When a glass is rubbed with silk, the rod becomes positively charged, but when a rubber rod is rubbed with fur, the rubber becomes negatively charged. Suppose you have a charged object but don't know whether its charge is positive or negative. Explain how you could use a glass rod and a piece of silk to determine the sign of the unknown charge on the object. 

When wool is rubbed against amber, the wool becomes positively charged and the amber becomes negatively charged. If you rub a glass rod with a silk cloth and an amber rod with a wool cloth, are the rods attracted to or repelled by each other? Are the cloths attracted to or repelled by each other? Is the silk cloth attracted to the amber rod or repelled by the amber rod? Is the wool cloth attracted to the glass rod or repelled by the glass rod? Explain your answers.

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