What is vec(4) + vec (B) ?
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- Experimentally, it is found that natural potassium emits 31 beta particles per second per gram and 3.4 gamma rays per second per gram. With this data, determine the half- life period of K40. (The isotopic concentration of K40 is 0.0118% .)So I just need help with the last question where it gives you the 160 The answer for the first question is 1.168 x 10^12 And the answer for the second one is 0.140 , i just need taht last onea) What is the role of electrical forces in nuclear fission? b) What is the role of a neutron in nuclear fission?
- A 4-MV linear accelerator is installed 3 meters from a 150-cm thick wall of concrete separating the treatment room from an automatic elevator. The accelerator treats 150 patients per week with an average isocenter dose of 200 cGy. What is the transmitted dose to the elevator? What is the minimum thickness of concrete necessary to keep the dose below the maximum level?Cs-137 produces beta-minus particles. What types of interaction are likely to occur if a Cs-137 source is shielded in glass? In lead?From the following data for the first-order gas- phase isomerization of CH3 NC at 215 °C, calculate the first-order rate constant and half-life for the reaction: Time (s) Pressure CH3 NC (torr) 4 Part A Calculate the first-order rate constant. Express your answer using three significant figures. 0 510 2000 345 5000 192 8000 107 12000 49 15000 27.3 Part B k ΜΕ ΑΣΦ Submit Request Answer 0 ? Calculate the half-life. Express your answer using three significant figures. ΑΣΦΑ Ο ΑΣΦ 1/2 ? 8-1 S
- ✓ ON "O 2.75 MeV 0.511 MeV 0.511 MeV B, E= 1.73 MeV Eave = 0.721 Mev O MeVA Geiger counter is placed at a distance 2m from a Cobalt 60 source emitting γ rays. The measured count rate is 545/min.. What is the count rate when the Geiger counter is moved to a new position 7m from the 60Co?Calculate the volume needed to dispense a 21 mCi dose from a Tc-99m DTPA vial containing 400 mCi in 6 ml. Answer: