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

Electron are accelerated through a potential difference V and protons are accelerated through a potential difference of 4 V. The de-Broglie wavelength are lamda_e and lamda_p for electrons and protons, respectively The ratio of lamda_e/lamda_p is given by ( given , m_e is mass of electron and m_p is mass of proton )

Select the correct curve (s) : If = V Velocituy of electron in Bohr's orbit r= Radius of electron in Bohar's orbit P.E = Potential energy of electron in Bohr's orbit K.E. = Kinetic energy of electron in Bohr's orbit

If the total energy of an electron is -1.51 eV in hydrogen atom then find out K.E,P.E. , orbit radius and velocity of the electron in that orbit.

The ground state energy of hydrogen atom is -13.6eV. What are P.E. and K.E. of electron in this state?

In the derivation of P_1-P_2=rhogz it was asumed that the liquid is incompressible. Whuy will tis equation not be stictly valid for a compressible liquid?