Hi. This problem asks to find the force between two 2.0 mm diametercopper sphere
ID: 1753306 • Letter: H
Question
Hi. This problem asks to find the force between two 2.0 mm diametercopper spheres that are 1.0 cm apart. The proton charge differsfrom the magnitude of the electron a mere 1 part in 10^9. And weare also to assume that each copper atom has an equal number ofelectrons and protons.I am confused as to how the number of 2.53x10^20 was achieved whentrying to find out the number of protons/electrons in the sphere.Also, when finding the net charge on each sphere, shouldn't thenumber of protons/electrons found in the first part, 102.37x10^20,be multiplied by the proton charge, 1.6x10^-19, along with the10^-9 that was shown? I would really appreciate the help. Thankyou!
Explanation / Answer
Hi. This problem asks to find the force between two 2.0 mm diametercopper spheres that are 1.0 cm apart. The proton charge differsfrom the magnitude of the electron a mere 1 part in 10^9. And weare also to assume that each copper atom has an equal number ofelectrons and protons. I am confused as to how the number of 2.53x10^20 was achieved whentrying to find out the number of protons/electrons in thesphere. the problem is not completely given .hence before going to answerlet me assume and answer. as far as electrostatic force is concerned there should be chargeson each sphere without that there will be no force betweenthe charged spheres. so if charge is given from the formula q=n*e we can find out the number of protons orelectrons which may constitute the charge. for example if a charge of 1 coulomb is present 1=n*1.6*10-19 calculating n=6.25*1018 similarly if charge is given we can calculate no of chargedparticles. Also, when finding the net charge on each sphere, shouldn'tthe number of protons/electrons found in the first part,102.37x10^20, be multiplied by the proton charge, 1.6x10^-19, alongwith the 10^-9 that was shown? I would really appreciate the help.Thank you! net charge on each sphere can be calculated by knowing excess orless no of electrons present on the spheres. if number of electrons=number of protons on the sphere the netcharge=0 hope the problem is clear.
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