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Simple physics question
Posted: Thu May 19, 2005 10:15 pm
by Guest
Coulomb's law and newton's law of gravitation both involve which of the following?
A) the mass of the particle
B) the charge on the particle
C) permeability
D) permittivity
E) the inverse-square law
Posted: Thu May 19, 2005 10:17 pm
by LeonardoP
gimme the formulas and ill sort you out :icon14:
Posted: Thu May 19, 2005 10:21 pm
by Guest
ok
coulomb's law: F=k((Q1)(Q2)/r²)
newton's law of gravitation: F=G((M1)(M2)/r²)
Posted: Thu May 19, 2005 10:27 pm
by LeonardoP
whats the k stand for? and the radius of what is used? lol i forgot almost everything.
also whats permeability and permitivity mean?
Posted: Thu May 19, 2005 10:28 pm
by mjrpes
The answer is E (yes, this is a guess)
Posted: Thu May 19, 2005 10:29 pm
by saturn
yeah, it's E
Posted: Thu May 19, 2005 10:33 pm
by LeonardoP
ow theres just one answer. forgot what the inverse square law was but i checked it out, and yeah they're right (obviously)
Posted: Thu May 19, 2005 10:38 pm
by Guest
Looks like thats right. I didn't know there was an official "inverse square law"
http://hyperphysics.phy-astr.gsu.edu/hb ... s/isq.html
Posted: Thu May 19, 2005 10:39 pm
by Guest
Btw, permeability applies to gravity and permittivity applies to electric charge.
Posted: Fri May 20, 2005 8:41 am
by MKJ
HOMEW3RKWORLD
...your grades are waiting...
Posted: Fri May 20, 2005 11:28 am
by Nightshade
ToxicBug wrote:Btw, permeability applies to magnetic materials and permittivity applies to dielectrics.
Posted: Fri May 20, 2005 11:35 am
by Guest
Yea, I've learned that after a quick google
