Question

Two protons in a hydrogen molecule are 2.80

Answer 1

F [Electric force ] = ( K*q^2)/r^2.............as q1= q2=q = 1.6*10^-19C so q1*q2= q^2

F= (9*10^9 *( 1.6*10^-19 )^2 )/( 2.80*10^-10)^2 = 2.938*10^-9 N

F1[ gravitational force ] = ( G*m1*m2) /r^2

G = 6.67*10^-11N-m^2/kg^2

m1=m2=1.67*10^-27kg

r= 2.80*10^-10m

substuting all this values in above equation we get

F1 = 2.37*10^-45 N

conclusion : we see magnitude of electric force is very much higher than gravitational force that's why we ignore gravitational force in electrostatics