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[DOC File]Radioactive Decay: A Sweet Simulation of Half Life
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Strontium-90 has a half-life of 28.8 years. If you start with a 10-gram sample of strontium-90, how much will be left after 115.2 years? (Show the math). A) Explain what is meant by half-life? B) What kinds of materials do we use with the term half-life?
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[DOC File]Oxidation and Reduction Reactions Workbook
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4. Oxidation Numbers, Application to Reactions. WS 3 5. Balancing Redox Half Reactions Acid/Base. WS 4 2. 6. Balancing Redox Reactions in Acid/Base. WS 5 7. Standard Potentials Using Chart. WS 6 3. 8. Electrochemical Cells. WS 7 9. Electrochemical Cells Lab. 10. Electrolytic Cells. WS 8 4…
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[DOC File]GPM/GPH Flow based on PVC Pipe Size
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Size (ID, inches) Length (inches) Flow (GPM) 1/2 4.25 26 3/4 4.62 50 1 5.00 94 1-1/2 6.50 260 2 7.00 480 2-1/2 7.50 750 3 8.00 1300 4 9.00 2300 6 15.50 5400 Note: The data is for water through the valve only, and does not take into account the rest of the system.
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[DOC File]Module 1
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Sep 06, 2017 · Divide by 4 2.27 × 103 N Allow their central force. B1 (iii) mgh = ½ mv2. B1. Condone: Use of v = 2πfA (max2) 9.8×44 = 0.5 v2 Allow 45 in substitution. B1. Condone 22 m s−1. 29.4 m s−1 (Use of 45 gives 29.7) B1. 106 km h−1 (their m s−1 correctly converted) Or compares with 33 m s−1. B1
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[DOC File]www.lancasterschools.org
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# of half-lives = total time/1 half-life = 32 d/8.07 d = 4 half-lives. Step 3: Set up a chart that shows the amount decaying by ½ with the passing of each half-life. Hint: Make sure that the initial amount is always before the first half-life at 0.
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[DOC File]Teacher Guide & Answers
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Possible answers include: yellow, solid, approx 3/4 kg, soft at room temperature. 8. Possible answers include: yellow paint, wood. interior, solid, graphite core, 2–3 g. 9. Possible answers include: shaped like a horseshoe, often with the handle portion painted red, attracts steel, solid. ... half of a sample of a radioactive isotope to decay ...
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[DOC File]Half-life Practice Worksheet
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The half-life of cobalt-60 is 5.26 years. How many half-lives have passed in 10.52 years? 12.5% of a radioactive sample are left. How many half-lives have passed? After 3 half-lives, how much of a 400 gram sample of radioactive uranium remains? After 4 half-lives 10 grams of uranium remains. How much uranium did you start with?
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[DOC File]GENETICS WEBQUEST
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4. In addition to our genes, the _____ we live in also helps define our traits. 5. Humans have two complete sets of _____ chromosomes. 6. When parents conceive a child, each parent contributes _____ set of chromosomes. 7. Every child receives _____ of its chromosomes from the mother and half …
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[DOCX File]Unit 4 Practice Problems
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Unit 4 Practice Problems. Lesson 1: Lots of Flags. Lesson 2: Ratios and Rates with Fractions. Lesson 3: Revisiting Proportional Relationships. Lesson 4: Half as Much Again. Lesson 5: Say It with Decimals. Lesson 6: Increasing and Decreasing. Lesson 7: One Hundred Percent. Lesson 8: Percent Increase and Decrease with Equations. Lesson 9: More and Less than 1%. Lesson 10: Tax and Tip
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[DOC File]Half-life Practice
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3 half lives so n=3. The solution is: If 20.0 g of a radioactive isotope are present at 1:00 PM and 5.0 g remain at 2:00 PM, what is the half life of the isotope? In this problem, you must figure out how many half lives have occurred. After one half life 20.0g becomes 10.0g. After a second half …
one half of 3 4

3 4 in half