题目 放射物理 英文版 教学课件.docVIP

Problems 1. A car accelerates at a race of 5.0 km per hour per second. Express this acceleration 2. A ..rent of 1.0 wA flows into a condenser of capacity 100 IF for 5.0 s. Calculate the potential difference between the plates of the condenser. 3. A patient is given an z ray cap osu a of 200 R. Calculate this exposure in C kg-. 4. After a full course of treatment, a mmor received a dose of 4000 ads. Express this dose in grays, in McV per g. 5. A source of cobalt 60 with half-life of 5.2 years has an activity of 1100 Ci. Express this activity in becquereh. Estimate the activity after 55 years. 6. Hydrogen in nature exists a a mixture of iH and ,H with atomic masses of 1.007825 and 2.014102, respectively. These occur in relative abundance 99.985% and 0.015%. Calculate the atomic weight of hydrogen. Check your answer with Table 1-3. 7. Lithium in nature consists of two isotopes of atomic masses 6.01513 and 7.01601, with percentage abundances of 7.42% and 92.58%. Find the atomic weight. Check your answer with Table 1-8. 8. In the complete decay of 1000 atoms of ;B. how many beta particles will be re- leased and how much energy as gam rays? (See Fig. 1-3.) 9. A deuterium atom is made up of a proton (atomic mass 1.007276), an electron (atomic mass 0.000548), and a neutron (atomic mass 1.008665). The mass of the deuterium atom is 2.014102. Find the energy in MrV required to bring about the disintegration of the deuterium into hydrogen plus a neutron. 10. A certain radioactive material emits gam rays with energy I MvV. Another sam- ple of radioactive material emits gam trays with energy 10 keV. If both of these mil the same amount of energy per nut time, compare their activities. 11. A radio station transmits at a frequency of 900 kHz. Find the wavelength of the radiation. Find the energy in electron volts of 1 quantum of such radiation. 12. Electromagnetic waves of length 10 cm are used in radar installations. Calculate the frequency of such radiation and the energy of 1 qu