• Please use white paper to explain your answer.
• Also, put your answer in a whole number. Unless it shows an error put them in decimal points.

1)

Electromagnetic waves with wave length 3 nm are used in an X ray machine. What is the frequency of the waves? Number Hz. (The comparison is done to 1% accuracy.) A beam of photons with energy 3 MeV, is emitted from a source inside a nuclear power plant. The beam goes through 0.7 m water, 11 cm concrete and a 13 cm lead shield. How large is the intensity (in % of the initial intensity) after the lead shield? The absorption coefficients are . water, 1m = 5 cm. - concrete, \" = 50m. - lead, \"[1 = 1.5 cm. An answer within 1% of the correct answer wll be accepted. You will probably need to use scientific notation to input the answer. For example 0.05 = 5E-2. Number Electromagnetic radiation of frequency 7 E17 Hz hits a dectector. What is the energy of the photons (in units of eV). Number eV.Consider the energy levels oi the hydrogen atom. Compute the energy difference between the ground state (n=1) and the 3th level in eV. (this should be a positive number). Number eV The comparison is done to 1% accuracy. One NOT gate is added to one of the inputs to an OR gate, as shown in the following diagram A >. B Which inputs of A and B produce 0:!) '? Choose one of the following answers: 0 A=O, 3:0 0 A=0, 3:1 0 A=1, 3:0 0 A=1, B=1 Convert the decimal number 379 in binary (base 2) Number\fCompute the sum of the binary numbers 10111000 and 1011011001 in binary: Number