Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 25.9, Problem 13SC
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The diploid number in humans.
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238U92 --> __________ + 4He2
Explain how "carbon dating" is used to establish the age of once living things.
5.Atree falls in a forest. How many years must pass before the carbon-14 mass in the tree’s carbon drops to 3.125% of its value in living tree? The half-life of carbon-14 is T= 5570 years.
Chapter 25 Solutions
Integrated Science
Ch. 25.1 - Prob. 1SCCh. 25.1 - Prob. 2SCCh. 25.2 - Prob. 3SCCh. 25.2 - Prob. 4SCCh. 25.2 - Prob. 5SCCh. 25.4 - Prob. 6SCCh. 25.4 - Prob. 7SCCh. 25.5 - Prob. 8SCCh. 25.5 - Prob. 9SCCh. 25.5 - Prob. 10SC
Ch. 25.9 - Prob. 11SCCh. 25.9 - Prob. 12SCCh. 25.9 - Prob. 13SCCh. 25.10 - Prob. 14SCCh. 25.10 - Prob. 15SCCh. 25 - Prob. 1CQCh. 25 - Prob. 2CQCh. 25 - Prob. 3CQCh. 25 - What are advantages and disadvantages of the...Ch. 25 - Prob. 5CQCh. 25 - Prob. 6CQCh. 25 - Prob. 7CQCh. 25 - Prob. 8CQCh. 25 - What are the differences between oogenesis and...Ch. 25 - List the hormones associated with the functioning...Ch. 25 - Prob. 11CQCh. 25 - Prob. 12CQCh. 25 - What advantage does a sexually reproducing,...Ch. 25 - Prob. 14CQCh. 25 - Prob. 15CQCh. 25 - Prob. 1PEACh. 25 - Prob. 2PEACh. 25 - Prob. 3PEACh. 25 - Prob. 4PEACh. 25 - Prob. 1PEBCh. 25 - Prob. 2PEBCh. 25 - Prob. 3PEBCh. 25 - Prob. 4PEB
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- Suppose a person swallows some radioactive material by accident. What information is needed to be able to assess possible damage?arrow_forwardAre some types of cancer more sensitive to radiation than others? If so, what makes them more sensitive?arrow_forwardWhat radioisotope could be a problem in homes built of cinder blocks made from uranium mine tailings? (This is true of homes and schools in certain regions near uranium mines.)arrow_forward
- A nucleus of oxygen-15 undergoes electron capture. Write out the reaction equation and determine the identity of the daughter nucleus.arrow_forwardDo not copy from other sites use it as refrence pleasearrow_forwardThe carbon content of living trees includes a small proportion of C-14, which is a radioactive isotope. After a tree dies, the proportion of C-14 in it decreases due to radioactive decay.Suggest why the method of carbon dating is likely to be unreliable if a sample is:a) < 200 years oldb) > 60,000 years oldarrow_forward
- When we use petrol we are ultimately using stored energy from the sun. Plants capture the energy when growing, and then through a long process of decay and compression this plant matter is converted into a fossil fuel. An interesting question is how much sunlight is needed to produce a quantity of petrol. To estimate this, let's assume the petrol has come from wood, and let's assume we have a fast-growing wood source such as Pinus radiata. Assume also: a mature tree contains around 3 m3 of timber; a tree is harvested when 35 years old; the density of wood is around 500 kg/m3; 2 kg of wood makes 1L of petrol; a tree receives on average 8 hours of sunlight per day. How many "hours of sunlight" are stored in 1L of petrol? i.e. how many hours of sunlight does a tree need to be exposed to, to produce the amount of wood needed to make 1 L of petrol? Give your answer to two significant figures.arrow_forwardOne useful radioisotope useful for dating the age of certain archaeological items is Carbon-14. Carbon-14’s half-life is 5,730 years. Assume you have found clay pottery from an archaeological site that is 17,190 years old. Based on radioisotope changes how much Carbon-14 should be left in the clay pottery? a. 6.125% b. 12.5% c. 25% d. 50%arrow_forwardSome scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?arrow_forward
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