iTeachChem•4mo ago

Electrostats

I need to find centre of mass of the meni hemisphere. How to do that?

iTeachChem Helper•9/17/25, 2:11 PM

@Gyro Gearloose

iTeachChem Helper•9/17/25, 2:11 PM

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CorrodedCoffin•9/17/25, 2:18 PM

is alpha 6

CorrodedCoffin•9/17/25, 2:18 PM

without mass of charge particle u cant comment on com

CorrodedCoffin•9/17/25, 2:19 PM

if u ignore it then ofc its the geometric centre

CorrodedCoffin•9/17/25, 2:19 PM

of the entire sphere

PrasanOP•9/17/25, 2:21 PM

Yes alpha is 6

PrasanOP•9/17/25, 2:22 PM

Kese kara

CCorrodedCoffin if u ignore it then ofc its the geometric centre

PrasanOP•9/17/25, 2:22 PM

Nahi mei kehra, jo half hemispheres ha unke centre of masses ka distance

PrasanOP•9/17/25, 2:23 PM

@CorrodedCoffin

PPrasan Kese kara

CorrodedCoffin•9/17/25, 2:26 PM

F = A * pressure

PPrasan Nahi mei kehra, jo half hemispheres ha unke centre of masses ka distance

CorrodedCoffin•9/17/25, 2:26 PM

11th mein derive nahi kara tha

CorrodedCoffin•9/17/25, 2:26 PM

CorrodedCoffin•9/17/25, 2:27 PM

ring element leke

PrasanOP•9/17/25, 2:28 PM

Vo to hemisphere ka tha na

CorrodedCoffin•9/17/25, 2:29 PM

oh half hemisphere

CorrodedCoffin•9/17/25, 2:29 PM

CCorrodedCoffin F = A * pressure

PrasanOP•9/17/25, 2:29 PM

Electrostatic pressure se

PPrasan Electrostatic pressure se

CorrodedCoffin•9/17/25, 2:29 PM

yeh hemispherical sphere kya hai

PrasanOP•9/17/25, 2:30 PM

Dekh ek sphere ha

PrasanOP•9/17/25, 2:30 PM

Usko kata

CorrodedCoffin•9/17/25, 2:30 PM

meine toh 2 hemispheres maanke kara

PrasanOP•9/17/25, 2:30 PM

Jo hemisphere bana usko kaata

PrasanOP•9/17/25, 2:30 PM

Ab ye kaatke jo 2 quarter se bane ha, unki charge density ha sigma 1 and 2

CCorrodedCoffin meine toh 2 hemispheres maanke kara

CorrodedCoffin•9/17/25, 2:31 PM

pi r ^2 sigma 1 sigma 2 / 2 epsilon

CorrodedCoffin•9/17/25, 2:31 PM

ques ki lang ajeeb si hai

CCorrodedCoffin pi r ^2 sigma 1 sigma 2 / 2 epsilon

PrasanOP•9/17/25, 2:32 PM

Ye kara tha mene, usse 12 aaraha tha com vale method se

PrasanOP•9/17/25, 2:32 PM

Ruk bhejta hu

PrasanOP•9/17/25, 2:33 PM

rn_image_picker_lib_temp_52d4fa28-09a8-4fd1-85c8-c7755c9616c3.jpg

CorrodedCoffin•9/17/25, 2:36 PM

we can assume total charge on com always ?

PrasanOP•9/17/25, 3:53 PM

ig so

PrasanOP•9/17/25, 3:53 PM

@integralofe^2v

PPrasan @integralofe^2v

integralofe^2v•9/17/25, 4:35 PM

Idts u can write the entire charges on sphere as a single point charge, as the electric field due to both of these isnt same in center, instead try finding the electric field due to 1 hemisphere at center and multiply by charge to find force

Iintegralofe^2v Idts u can write the entire charges on sphere as a single point charge, as the e...

CorrodedCoffin•9/17/25, 4:45 PM

is pi r ^2 sigma 1 sigma 2 / 2 epsilon
pir^2 is projected area and the other term is electrostatic pressure

CCorrodedCoffin is pi r ^2 sigma 1 sigma 2 / 2 epsilon pir^2 is projected area and the other te...

integralofe^2v•9/17/25, 4:47 PM

yea that works too

CorrodedCoffin•9/17/25, 4:49 PM

alrr

Iintegralofe^2v Idts u can write the entire charges on sphere as a single point charge, as the e...

PrasanOP•9/17/25, 5:22 PM

Electric field due to half hemisphere at the centre?

PPrasan Electric field due to half hemisphere at the centre?

integralofe^2v•9/17/25, 5:23 PM

yes

integralofe^2v•9/17/25, 5:23 PM

sigma/4epsilon

integralofe^2v•9/17/25, 5:23 PM

u an derive byt aking ring elements

PrasanOP•9/17/25, 5:36 PM

Hemisphere and half hemisphere ki same hoti kya

PPrasan Hemisphere and half hemisphere ki same hoti kya

integralofe^2v•9/17/25, 5:39 PM

no wait mb i meant field due to full hemisphere ( half sphere) we dont need half hemisphere here, its sigma/4spsilon for this shape

PrasanOP•9/28/25, 3:31 PM

@integralofe^2v can u please send a solution to this.

PPrasan @integralofe^2v can u please send a solution to this.

integralofe^2v•9/28/25, 3:52 PM

PrasanOP•9/28/25, 3:54 PM

Thanks a lot

PrasanOP•9/28/25, 3:54 PM

+solved @integralofe^2v

iTeachChem Helper•9/28/25, 3:54 PM

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Time

September 28, 2025

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@813025027611688970 (813025027611688970)

Electrostats

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