Physics :

Question 9 10 pts An X-ray photon has a momentum of 4.9 x 10'23 kg m/s. Determine its energy in keV. Your answer should be a number with one decimal place. E Question 10 10 pts What is the wavelength of an electron accelerated through a 26-kV potential? The mass of the electron is 9.11 x 10'31 kg. Your answer should be in the form: N x 10'12 m, N should be a number with two decimal points. Please enter only the number N, do not include units. S