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Find the ratio of the electric and gravi...

Find the ratio of the electric and gravitational forces between two protons.

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`Mass of proton =1.67xx10^-27kg, `
` Charge of an electron = 1.6 xx10^-19c `
Gravitational constant,
` G=6.67xx10^-11,K=9xx10^9 `
` F_e=K(Q^2)/r^2 F_G=G(M^2)/r^2 `
` F_e/F_G=Kq^2/Gm^2 `
` (9xx10^9xx(1.6xx10^-19)^2)/(6.67xx10^-11xx(1.67xx10^-27)^2) `
` =1.23xx1`
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  13. Two small spheres, each having a mass of 20 g, are suspended form a co...

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  15. A particle having a charge of 2.0xx10^(-4) C is placed directly below ...

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  16. Two particles A and B having charges q and 2q respectively are placed ...

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  18. A particle A having a charge of 2.0xx10 ^(-6) C is held fixed on a ho...

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  19. A particle A having a charge of 2.0xx 10^(-6) C and a mass of 100 g i...

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  20. Two particles A and B having equal charges are placed at distance d ap...

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