The value of unified atomic mass unit "(u)" is about
`1.61times10^(-22)kg`
`1.67times10^(-27)kg`
`9.1times10^(-31)kg`
`1.67times10^(-24)kg`

Use Avogadrs's number to show that the atomic mass unit is 1 u =1.66 xx 10^(-27) kg .

The ratio of electric and gravitational force between two protons.Charge of each proton is 1.6times10^(-19)C mass is 1.67times10^(-27)Kg and G= 6.67times10^(-11)Nm^(2)Kg^(-2) .

The desity of a nucleus in which mass of each nucleon is 1.67xx10^(-27)kg and R_(0)=1.4xx10^(-15)m is

Considering the wavelengths of electron and proton to be equal,the ratio of their velocities (v_(e)/(v_(p) would be: (mass of electron =9.1times10^(-31)kg, mass of proton =1.67 times10^(-27)kg

A neutron breaks into a proton and electorn. Calculate the eenrgy produced in this reaction in m_(e) = 9 xx 10^(-31) kg, m_(p) = 1.6725 xx 10^(-27) kg, m_(n) = 1.6747 xx 10^(-27) kg, c = 3xx10^(8)m//sec .

How many protons weight 5kg? The mass of a proton is 1.67xx10^(-27)kg .