HLTA02H3 Lecture : march 16 lecture

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lilacmarten989

26 Apr 2011

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risk of infection is greatest: potassium iodide is treatment for radiation sickness www. notesolution. com. thyroid gland absorbs iodine from anywhere even radiation contaminated air. radiation exposure will increase the incidence of thyroid cancer by. Jordan"s principle: allow aboriginal children to receive proper healthcare, federal and provincial dispute to provide treatment, died at the age of 5. In ontario, family law act section 31:1: every parent has an obligation to provide and support a child who is a minor and is enrolled in full-time education, does not apply to children 16 and over www. notesolution. com. March 16, 2011: environment, work and health. Ulrich beck (1992) contends that we live in a risk society where the unanticipated side effects or unintended consequences and externalities of the industrialization process are brought to the political forefront. Studies have shown that today, virtually every living human being to some degree carries what is known as a toxic body burden.

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Electromagnetic radiation is emitted when a charged particle movesthrough a medium faster than the local speed of light. Thisradiation is known as Cerenkov radiation. Cerenkov radiation isfound in many interesting places such as particle detectors andnuclear reactors and can even be seen by astronauts when cosmicrays traverse their eyes. It should be stressed that the particleis never going faster than the speed of light in vacuum (or c),just faster than the speed of light in the material (which isalways less than c). The creation of Cerenkov radiation occurs inmuch the same way that a sonic boom is created when a plane ismoving faster than the speed of sound in the air. The variouswavefronts that propagate in the material add coherently to createan effective shock wave. In this problem, you will become familiarwith this type of radiation and learn how to use its properties toget information about the particles that created it.
A)What is the threshold velocity v_threshold (water) (i.e., theminimum velocity) for creating Cerenkov light from a chargedparticle as it travels through water (which has an index ofrefraction of n=1.33)?
v_threshold (water) =c
B)What is the threshold velocity v_threshold (ethanol) for creatingCerenkov light from a charged particle as it travels throughethanol (which has an index of refraction of n=1.36)?
v_threshold (ethanol) =c
C)Which of the following best explains why neutrally chargedparticles can't give off Cerenkov radiation?

a)Neutral particles are too heavy to emit radiation.
b)Neutral particles don't interact with the electromagnetic fieldsof the medium.
c)Neutral particles can't move above the threshold velocity forCerenkov radiation.
d)Charged particles hit the nuclei of the material more often andthus create more radiation

Using this Article answer these questions...

https://www.fas.org/sgp/crs/misc/RL31793.pdf

Question 1: How do you balance the overall risks and benefits of vaccinations that most infants and children receive in the U.S.?
Question 2: How do you feel about this statement: So long as a disease is rare where I live, my family and I should avoid getting vaccinated because of the risk of adverse reactions.
Question 3: How do you feel about this statement: Even though there's some risk of adverse reactions to vaccines, my family and I should be vaccinated, because if we aren't we put the health of others at risk.
Question 4: Currently, all 50 states have school immunization laws requiring that children receive vaccinations, although different states may have somewhat different requirements and potential religious or philosophical exemptions. How do you feel about schools requiring vaccines?
Question 5: Do you believe that parents should have sole decision-making power about immunizing their children, in contrast to external regulations or requirements?

HLTA02H3 Lecture : march 16 lecture

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