11. How can you protect yourself and the environment from the harmful effects of electro-B. Critical Thinking. Answer the following.its speed in water. Compare the wavelength of light in ait to that in water. Also, compare itswavelength changes. Light travels from air to water, The speed of light in air is 1.33 timesWhen light passes from one medium to another, its frequency remains the same but itsumWhy do astronauts use radios while talking to one another in outet space?What do you call the process whereby a radioactive material is implanted in a runaed wavelength15brachytherapyb. computed axial tomographyendoscopymagnetic resonance imagingC.d.1.Poosleenergy in the two media.n kvoy a thermal scanner placed in an airport can help prevent the spread of somediseases such as bird fly.rekris 6x 106s for the red light from a laser pointer to teach its target and bounce bad4.What is the distance of the target from the laser pointer?S Your favorite radio program broadcastS at 96.3 MHz. What is the wavelength correspondineTo this broadcast? Theoretically, the antenna of your radio is half of the wavelength of theradio waves. How long should an antenna be for this frequency?6. What is the frequency of an electromagnetic wave that has an energy of 1.989x10 P Inwhat tegion of the electromagneric spectrum does this wave belong?7. A certain laser pointer gives light with a wavelength of 632 nm. What is the color af thislight? What is its energy?8. Electromagnetic wavesA and B propagate in vacuum. The ratio of the frequency ofelectromagnetic wave A to electromagnetic wave B is 1:2. (a) What is the ratio of theitspeeds? (b) What is the ratio of the wavelength of A to the wavelength of B? (c) Whar is theratio of the energy of A to the energy of B?Essential Questions9. What makes a wave electromagnetic?10. How do electromagnetic waves affect you?magnetic waves?Chapter 4 Waves of Change 9

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Answered: 13 What do you call the process whereby…

13 What do you call the process whereby a radioactuve material is implanted in a rumnt brachytherapy computed axial tomography endoscopy magnetic resonance imaging a. b. C. d.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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The isotope N N has a half-life of 9.96 min. Determine the time interval (in min) required for the activity of a sample of this isotope to decrease to 39.0% of its original value. min Additional Materials O Reading
27. In regards to LET, which of the following radiations is different than the A. Gamma rays B. Alpha particles C. Neutron beam others? D. Proton beam 28. In this graph that shows two trends with respect to energy for water and lead, what process does "a" represent? A. Pair Production B. Compton Scattering C. Photodisintegration D. Photoelectric Absorption 100-N 10- HM 1 1- .01- .001 10 100 .01 Mev 29. Which of the following radiation parameters is no konger in use today? A. Effective dose B. Equivalent dose C. Tolerance dose D. Exposure 30. This schematic depicts a device that meastures radiation exposure. Three of the following things happen in the gray-shaded area. Which one does not happen? A. Radioactive decay B. Particle ionization C. Photoelectric absorption D. Charge migration 31. What is the SI equivalent of a 9.2-R exposure? A. 3.8x10" C/kg B. 2.2x 10" C/kg C. 3.6x10' C/kg D. 2.4x 10 C/kg
At iThemba LABS a scientist placed a radio-isotope (with a halflife of ONE hour) near a Geiger counter and she observes that the Geiger counter measures 80 counts per minute. After TWO hours have gone by, what counts will the Geiger counter register? FULLY EXPLAIN A. 20 counts/min B. Zero counts/min C. 40 counts/min D. 80 counts/min
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A uranium nucleus 238U(initially at rest) decays into a thorium nucleus 234Th and an alpha particle. Which one has the greater momentum? a) the 234Th nucleus b) the alpha particle c) both the same d) It depends on the stability of 234Th
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RADIATION DOSIMETRY A THEORY RADIATION DOSES non-SI units (relationship between units) Dose Formula SI units ΔΕ J/kg = Gray (Gy) Absorbed Dose, rad 1 Gy = 100 rad Δm AE is the energy lost from the radiation beam, and Am is the mass of the material into which the energy is absorbed. ΔQ Roentgen (R) 1R = 2,58 · 104 C/kg Exposure dose, C/kg Δm where AQ is the electric charge freed by such radiation in a specified volume of air divided by the mass Am of that air. Relationship between absorbed dose and exposure dose D = f · X D is adsorbed dose , f is a coefficient depending on the kind of tissue being irradiated. H = Q · D where H is dose equivalent, Q is relative biological effectiveness of a particular kind of radiation, D is adsorbed dose. Equivalent Dose, Sievert rem Н (Sv) 1 Sv =100 rem Effective H ΣΗT Sievert rem 1 Sv =100 rem Equivalent Dose , Hef where HT = Wr · H, is the tissue-weighted dose equivalent to an organ or tissue, H, is the dose equivalent to the organ or tissue and the…
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Chemistry Calculate the coulomb energy for the following three nuclei using the semi-empirical mass formula. a) 19F b) 48Ti c) 63Cu
In radio-pharmacy Alpha, Beta-plus, Beta-minus and Gamma decay are all different forms of radio-Active decay. When Uranium-238 (with atomic number 92) emits an gamma particle, the resulting nucleus has atomic number A. 93 B. 91 C. 89 D. 92