1. [-11 Points] DETAILS OSCOLPHYSZO16 31 .2.P.001. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An energy of 31.0 eV is required to ionize a molecule of the gas inside a Geiger tube, thereby producing an ion pair. Suppose a particle of ionizing radiation deposits 0.460 MeV of energy in this Geiger tube. What maximum number of ion pairs can it create? pairs Additional Materials El Reading . I l + l l l l I 2. [/1 Points] DETAILS OSCOLPHYSZO16 31 .2.P.002. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A particle of ionizing radiation creates 4600 ion pairs in the gas inside a Geiger tube as it passes through. What minimum energy (in eV) was deposited, if 22.0 eV is required to create each ion pair? I e. l l l 3. [-/1 Points] OSCOLPHYSZO16 31.2.P.003. ASK YOUR TEACHER PRACTICE ANOTHER (a) A particle of ionizing radiation creates 4,600 ion pairs in the gas inside a Geiger tube as it passes through. What minimum energy (in J) was deposited, if 27.0 eV is required to create each ion pair? (b) If all of this energy is converted to thermal energy in the gas, what is its temperature increase (in K), assuming 55.0 cm3 of ideal gas at 0.200 atm pressure? (The small answer is consistent with the fact that the energy is large on a quantum mechanical scale but small on a macroscopic scale. Assume the initial temperature of the gas is 293 K.) K Additional Materials II] Reading 4. [/1 Points] OSCOLPHYSZO16 31.3.P.006. ASK YOUR TEACHER PRACTICE ANOTHER Find the length (in m) of a side of a cube having a mass of 4.2 kg and the density of nuclear matter, taking this to be 2.3 x 1017 kg/mz. m 5. [-/1 Points] DETAILS OSCOLPHYS2016 31.3.P.008. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 238pu is a manufactured nuclide that is used as a power source on some space probes. Find the radius (in fm) of a 238pu nucleus. fm + Additional Materials Reading 6. [-/1 Points] DETAILS OSCOLPHYS2016 31.3.P.010. MY NOTES ASK YOUR TEACHER The unified atomic mass unit is defined to be 1 u = 1.6605 x 10-2 kg. Verify that this amount of mass converted to energy yields 931.5 MeV. Note that you must use four-digit or better values for c and |9 el. E = mc2 = 1.6605 x 10-27 kg)( m/ s ) 2 1 ev = ev = 931.5 MeV7. [-/1 Points] DETAILS OSCOLPHYS2016 31.4.P.017. MY NOTES ASK YOUR TEACHER Write the complete decay equation for the given nuclide in the complete X, notation. Refer to the periodic table for values of Z. (Use_, B to signify the following part of the equation: - + ve.) - decay of H (tritium), a manufactured isotope of hydrogen used in some digital watch displays, and manufactured primarily for use in hydrogen bombs. chemPad Help X_ X" - =+ Greek Additional Materials Reading 8. [-/1 Points] DETAILS OSCOLPHYS2016 31.4.P.019. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Write the complete decay equation for the given nuclide in the complete zX notation. Refer to the periodic table for values of Z. B decay of 50Mn chemPad Help Greek9. {11 Points] DETAILS OSCOLPHYSZO16 31 .4.P.022. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Write the complete decay equation for the given nuclide in the complete :XN notation. Refer to the periodic table for values of 2. Electron capture by 114C5 chemPad a Help \"ME :| Addlllonal Matcrlals E1 Reading 10. [-/1 Points] DETAILS OSCOLPHY52016 31.5.P.044. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An old campre is uncovered during an archaeological dig. Its charcoal is found to contain less than % the normal amount of 14C. Estimate the minimum age of the charcoal (in years), noting that 28 = 256. years 11. {11 Points] DETAILS OSCOLPHYSZO16 31 .5.P.048. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to incandescence for long periods of time. Natural thorium is almost 100% 2:'IZTh, with a half-life of 1.405 x 101 y. If an average lantern mantle contains 210 mg of thorium, what is its activity (in Bq)? Additional Materials III Reading 12. [I1 Points] DETAILS OSCOLPHYSZO16 31.5.P.051 . MY NOTES ASK YOUR TEACH ER PRACTICE ANOTHER There is more than one isotope of natural uranium. If a researcher isolates 1.4 mg of the relatively scarce 235U and nds this mass to have an activity of 71.0 Bq, what is its half-life in years? years 14. [-/1 Points] DETAILS OSCOLPHYS2016 31.6.P.073. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) Calculate BE/A (in MeV) for Be. Stable and relatively tightly bound, this nuclide is most of natural beryllium. (Assume 1 u = 931.5 MeV/c'. Give your answer to at least 2 decimal places.) MeV (b) Calculate BE/A (in MeV) for Be. MeV Is the difference in BE/A between Be and Be significant? One is stable and common, and the other is unstable and rare. (Assume the difference to be significant if the percent difference between the two values is greater than 5%.) Yes No + Additional Materials Reading 15. [-/1 Points] DETAILS OSCOLPHYS2016 31.6.P.074. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The fact that BE/A is greatest for A near 60 implies that the range of the nuclear force is about the diameter of such nuclides. (a) Calculate the diameter (in fm) of an A = 60 nucleus. fm (b) Calculate BE/A (in MeV) for Fe and "Sr. The first is one of the most tightly bound nuclides, while the second is larger and less tightly bound. (Assume 1 u = 931.5 MeV/cz.) 56Fe MeV 90 sr MeV16. [-/1 Points] DETAILS OSCOLPHYS2016 31.7.P.078. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 5.00 T magnetic field is applied perpendicular to the path of charged particles in a bubble chamber. What is the radius of curvature (in m) of the path of a 11.9 MeV proton in this field? Neglect any slowing along its path. m + Additional Materials Reading 17. [-/1 Points] DETAILS OSCOLPHYS2016 31.7.P.079. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) Write the decay equation for the a decay of 228Th. (Enter your answer in the form *X.) chemPad Help Greek (b) What energy (in MeV) is released in this decay? The mass of the daughter nuclide is 224.020212 u. (Assume 1 u = 931.5 MeV/c2. Give your answer to at least 2 decimal places.) MeV (c) Assuming the residual nucleus is formed in its ground state, how much energy (in MeV) goes to the a particle? (Give your answer to at least 2 decimal places.) MeV13. [-I1 Points] OSCOLPHYSZO16 31.6.P.069. ASK YOUR TEACHER 2H is a loosely bound isotope of hydrogen. Called deuterium or heavy hydrogen, it is stable but relatively rareit is 0.015% of natural hydrogen. Note that deuterium has Z = N, which should tend to make it more tightly bound, but both are odd numbers. Calculate %, the binding energy per nucleon (in MeVucleon), for 2H. (Assume 1 u = 931.5 MeV/cz.) EA A 9 (D Bhdlng energy per nucleon (Mev per nucleon) % = MeVucleon Compare your result with the approximate value obtained from the graph in the gure. (Assume your result is the same as the value from the graph if they are within 0.5 MeVucleon of each other.) My result is greater than the approximate value obtained from the graph. My result is less than the approximate value obtained from the graph. My results is the same as the approximate value obtained from the graph