Is` p= E/c `valid for electrons?

Who discovered e//m for electron ? And how ?

Is Huygen's principle valid for longitudunal sound waves ?

If p: Number of factors of 20 are 5. q: 2 is even prime number. Then validity of p implies q and validity of contrapositive statement is ……….

(a) A monoenergetic electron beam with electron speed of 5.20 xx 10^(6) m s^(-1) is subject to a magnetic field of 1.30 xx10^(-4) T normal to the beam velocity. What is the radius of the circle traced by the beam, given e/m for electron equals 1.76 xx 10^(11)C kg^(-1) . (b) Is the formula you employ in (a) valid for calculating radius of the path of a 20 MeV electron beam? If not, in what way is it modified?

The bromine atom possesses 35 electrons .it contains 6 electrons in 2p orbitals 6 elecrons in 3p orbital and 5 electron in 4p orbitals which of these electron experience the lowest effective nuclear charge

Energy of an electron in the second orbit of hydrogen atom is E and the energy of electron in 3rd orbit of He will be

Which of the following relations is valid for Boolean algebra :-