In a hydrogen atom, the distance between the electron and proton is `2.5 xx 10^(-11)m`. The electricl force of attraction between then will be

In a hydrogen atom, the distance between proton and electron is 5.3xx10^-11m . The electrical force of attraction between them will be

The force between an electron and a proton is

The mass of the Earth is 6xx10^(24)kg . The distance between the Earth and the sun is 1.5xx10^(11)m . If the gravitational force between the two is 3.5xx10^(22)N what is the mass of the sun? G=6.7xx10^(-11) Nm^(2)//kg^(2)

Coulomb's law for electrostatic force between two point charges and Newton's law for gravitational force between two stationary point masses, both have inverse-square dependence on the distance between the charges/masses. Estimate the accelerations of electron and proton due to the electrical force of their mutual attraction when they are 1 Å(=10^(-10) m) apart? (m_(p)=1.67xx10^(-27) kg, m^(3)=9.11xx10^(-31) kg) .

The mass of the Earth and Moon are 6xx10^(24) kg and 7.4xx10^(22) kg respectively. The distance between them is 3.84xx10^(5) km. Calculate the gravitational force of attraction between the two? G=6.7xx10^(-11)Nm^(2)//kg^(2)