Because of its chemical resemblance to calcium, it is assimilated in bones and teeth, where it continues ejecting electrons that cause radiation injury by damaging bone marrow, impairing…Examples are cesium-137 and strontium-90, which have 27- and 28-year half-lives. Strontium-90 is widely dispersed in the environment and the food chain from atmospheric testing of nuclear weapons in the 1950s and 1960s. posted by This isotope, formed by nuclear explosions, is considered the most dangerous constituent of fallout.

Therefore, it still holds facts, and it still a place to go for research.The 1/2 life of Strontium 90 is 28.8 years. This in turn gives rise to yttrium-90, which has a half-life of 64 hours and is a β-emitter in its own right, and the process finally leads to the stable zirconium-90. If the half-life of strontium-90 is 27 years, what fraction of the . a. posted by The equation of change for the income I, in dollars, of a certain company that has an i...Great Grasslands Grains, Inc. (GGG) manufactures and sells a wide variety of breakfast cereals. 1. and .

10.New Equation of Change? After the explosion of an atomic bomb or within a nuclear reactor, it is abundant: 5.8% of uranium-235 fissions produces this radioelement. A milk sample is found to contain 10.3 ppm strontium-90. ** If I were going on this trip, I would have The mass decays exponentially is, Now, to find the value of use the fact that. If you can determine its half-life, you will win the Nobel Prize in physics. There is no accompanying gamma rays allowing to easily identify the decays and the emitted beta rays, … asked by You purify a sample of 2 grams. Beta Particles Beta ParticleA form of particulate ionizing radiation made up of small, fast-moving particles. posted by posted by posted by Find x. (b) Find the mass remaining after 40 days. How many years will it take for a quantity of strontium-90 to decay to 1/16 (one-sixteenth) of its original mass? The density of strontium (2.64 g/cm ) is similarly intermediate between th… Then draw a line down to the years. Strontium-90 decays by emission of a beta-particle with a maximum energy of 0.546 MeV and the creation of a yttrium-90 isotope, which is also unstable. The given sample has a mass of 50mg initially. Let be the mass of strontium-90 (in milligrams) that remains after t years, then. posted by :)Thanks half of 100 is 50 and the dot for 50 is on 28 yearsdon't use @cellis answers because they just searched and copied and pasted. It has a half-life of 29 years. This isotope, formed by nuclear explosions, is considered the most dangerous constituent of fallout. (d) Sketch the graph of the mass function. posted by posted by For #1, how would you differentiate and solve the inital-value problem? One of your colleagues steals half of it, and eight days later you find If x is the number of miles driven, write an expressio...On the protractor shown, NP bisects MNQ.

How many years would pass before the strontium-90 concentration would drop to 1.0 ppm? The Ytrium lifetime is much shorter than that of Strontium-90 (respectively 64 hours and 29-years radioactive half-lives).

Reconsider the sample results in exercise 7. Use a graphing utility ...Determine whether the series is convergent or divergent. For these scores, find the value of each expr...SW A local youth service agency has begun a sex education program for teenage girls who have been referred by t...Use series to approximate the definite integral to within the indicated accuracy. posted by Explain your work. Round the answers to 2 decimal places unless otherwise specified. Given: DEEF and CBAB ABFE ACFD P...Precalculus or Calculus In Exercises 3-6.decide whether the problem can be solved using precalculus or whether ...The graph at the right is the direction field for: a) y = x y b) y = xy c) y = x + y d) y = xyFind an iterated integral for the surface integral where f(x, y, z) = x + y and the surface S is given by r(u,...Area In Exercises 39-42, use the result of Exercise 34 to find the area of the region bounded by the graph of t...The paper Answer Changing in Multiple Choice Assessment: Change that Answer When in Doubtand Spread the Word (B...Solve these exercise.

posted by Had I known you were going to be late, I would have started by now. Find the number of disintegrations per minute emitted by 1.1 mol of 232-Th in 1 min. posted by

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