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- The energy of 30.0 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 0.500 MeV of energy in this Geiger tube. What maximum number of ion pairs can it create?How did you go from MgH= 1/2MV^2+1/2(2/5Mr^2)(v/r)^2 to gH=v(1/2+2/10)?The isotope of Nickel, 66Ni decays by β emission, has a half-life of 2.3 days. and the β particles have an average energy of 65 keV. A source consisting of this isotope has an initial number of atoms N0 = 5 x 1020 atoms. What is the power per unit area initially deposited by this source in a small target placed at 1m distance from the source? Select one: a. 1.45 W/m2 b. 7.6 MW/m2 c. 4.5 kW/m2 d. 35 W/m2
- Stars produce by fusion of 4 protons (1H atoms) into 4He and 2 positrons, Beta+. positive electrons and heat, Q, according to the following reaction: 4 1H -> 4 He + 2 Beta+ + Q Information: 1H - 1.00867 amu 4He - 4.00150 amu Beta+ - 0.00055 amu The heat Q, produced in J/mole Helium, is:The element 218Po (Polonium-218, Z = 84, atomic mass 218.008966 u) can decay through the emission of a β-particle to 218At (Astatine-218, Z = 85, atomic mass 218.00881 u). If all of the energy released is carried away by the β-particle's kinetic energy, calculate the kinetic energy of the β-particle.Give your answer in units of MeV, correct to two decimal places.: Evaluate the electron Debye length and number of particles for A laser fusion , electron beam fusion , with T = 1K eV , n = 1020 cm−3.
- decay in the discharging process to half of its maximum (V = Vo/2). This time is the half-life: t1= t1/2. 20.82 ms, 3.977v T1= 1.4 m/s Measure the time it takes for the voltage to decay to one-quarter (V = Vo/4 = (Vo/2)2) of its maximum. This is two half-lives: t2 = 2t1/2. Then divide this time by two to find the half-life (t1/2 = t2/2) 20.2-24.00 = 3.2 T2 = 3.2/2 = 1.6m/s Measure the time it takes for the voltage to grow to one-eighth (V = Vo/8 = (Vo/2)3) of its This is three half-lives, t3 = 3t1/2. Then divide this time by three to find the half-life, t1/2 = t3/3. 20.8 – 22.28= 1.48m/s T3= 1.48/3 = 0.49 m/s Take the average of the three measured values of the half-life. Estimate the precision of the measurement and state it as {half-life ± precision}…Now you have a nucleus with 15 protons at x = 7.3 Angstroms on the x-axis. How much work would it take to bring in ANOTHER nucleus with 12 protons from 1 m away and place it at y = 3.0 Angstroms on the y-axis? 189.4 eV 270.5 eV -57.5 eV 328.1 eVThe element 218Po (Polonium-218, Z = 84, atomic mass 218.008966 u) can decay through the emission of a β-particle to 218At (Astatine-218, Z = 85, atomic mass 218.00880 u). If all of the energy released is carried away by the β-particle's kinetic energy, calculate the kinetic energy of the β-particle.answer in units of MeV, correct to two decimal places.
- The figure provided shows the potential energy of a proton, q = +e, and a lead nucleus, q = +82e. If a proton is fired toward a lead nucleus from very far away with kinetic energy K = 3.00×10-12 J, how much kinetic energy does it have when it is 20.0 fm from the nucleus and moving toward it, before the collision? 5.00×10-12 J 4.00×10-12 J 3.00×10-12 J 2.00×10-12 JPls explain it in terms of P and V also if possible and in detail im a little weak.What is the nuclear radius of 40Ca? What energy electrons and protons are required to probe the size of 40Ca if one wants to “see” at least half the radius? hint. R =1.2 fm 14021/3 = 4.1 fm