Description : `Co^(60)` has half-life of `5.3` years. Find the number of half-lives for `7//8` of the orignal sample to disintergrate.
Last Answer : `Co^(60)` has half-life of `5.3` years. Find the number of half-lives for `7//8` of the orignal sample to ... yrs B. 9.2 yrs C. 10.6 yrs D. 15.9 yrs
Description : If a radioactive sample has decayed until only one eighth of the original sample remains unchanged how many half-lives have elapsed?
Last Answer : 3
Description : If a sample that originally contained grams of C14 has gone through two half-lives of decay how much C14 will be left?
Last Answer : 2.5
Description : If a sample that originally contained 10 grams of C14 has gone through two half-lives of decay, how much C14 will be left?
Description : Julie is going on an extended trip for three weeks. She lives in a remote area where there are frequent electrical power outages which can last up to three or four days. Julie has quite a bit of food ... power, while another house may have no power. She won?t be able to have a neighbor chec -Riddles
Last Answer : One thing Julie could do is freeze a tray of ice-cubes, and turn the tray of ice upside down in her freezer. When she comes home, she should check the tray. If the ice cubes are still in the ... clean out the freezer. She will have to make a judgment call if the ice-cubes are only slightly thawed.
Description : What is a way to determine age of fossil by comparing number of stable isotopes to number of unstable isotopes using half life?
Last Answer : Carbon decay or carbon dating
Description : You are given a sample of soil containing coarse grains to determine its water content, you will use (A) Pycnometer (B) Oven-drying method (C) Calcium carbide method (D) Alcohol method
Last Answer : Answer: Option A
Description : How could you determine the specific heat of a sample of a solid substance that does not react with water?
Last Answer : What is the answer ?
Description : How can a doctor determine the type of diabetes one may have just from a sample of blood?
Last Answer : A doctor can determine which type of Diabetes, Type 1 or Type 2, a person has by checking a blood sample for autoantibodies that are common in type 1 diabetes. This helps the doctor distinguish between the two types.
Description : For a sample rate of 40 kHz, determine the maximum analog input frequency A. 30 kHz B. 40 kHz C. 20 kHz D. 10 kHz
Last Answer : C. 20 kHz
Description : Which of the following formulae is used to determine how many people to include in the original sampling? a. Desired sample size/Desired sample size + 1 b. Proportion likely to respond/ ... size c. Proportion likely to respond/population size d. Desired sample size/Proportion likely to respond
Last Answer : d. Desired sample size/Proportion likely to respond
Description : The histogram above represents the lifespan of a random sample of a particular type of insect. Determine the relationship between the mean and median. a. mean = median b. mean ≈ median c. mean < median d. mean > median
Last Answer : d. mean > median
Description : Explain California bearing Ratio Test with neat sketch to determine % CBR of given soil sample.
Last Answer : Procedure of California Bearing Ratio Test: 1. Take a given soil; sample and add water equal to OMC of soil to prepare wet mix soil. 2. Take the CBR mould of 150 mm diameter and 175 mm height. Keep it ... Bearing Ratio of given soil as % CBR = (Test load / Standard load ) X 100.
Description : In a precise diet and nutrition study, you need to determine the average weight and average height of a group each to a precision of 1%. The minimum sample size required is w) 10 x) 100 y) 1000 z) 10,000
Last Answer : ANSWER: Z -- 10,000
Description : The `.^(60)C` isotope decays with a half life of 5.3 years. How long would it take for 7/8 of a sample of 500 mg of `.^(60)Co` to disintegrate?
Last Answer : The `.^(60)C` isotope decays with a half life of 5.3 years. How long would it take for 7/8 of a sample ... B. 15.9 years C. 10.6 years D. 5.3 years
Description : A radioactive sample has a half life 1500 years. A sealed tube conataining 1g of the sample will contain after 3000 years,
Last Answer : A radioactive sample has a half life 1500 years. A sealed tube conataining 1g of the sample will contain ... g of the sample D. 0.01g of the sample
Description : `C^(14)` has a half`-` life of 5760 years. `100mg` of the sample containing `.^(14)C` is reduced to `25mg` in a)11520years b)2880years c)1440years d)1
Last Answer : `C^(14)` has a half`-` life of 5760 years. `100mg` of the sample containing `.^(14)C` is ... 11520 years B. 2880 years C. 1440 years D. 17280 years
Description : How much cesium Half-Life2 years would remain from a 10 G sample?
Last Answer : Need answer
Description : What is the half life of 3 g sample of radioisotope that decay to 0.75 g in 30 days?
Last Answer : 15 days
Description : What is the half life of 12 g sample of radioisotope that decayed to 6 g in 28 years?
Last Answer : 28 years
Description : What fraction of an original sample of a radio isotope remains after 3 half-life periods?
Last Answer : One eighth remains.
Description : What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?
Last Answer : Half-life
Description : X210 has half life of 5 day. What is the time taken for seven-eights of sample of X210 to decay?
Description : The half-life of an isotope of an element is 5 days. The mass of a 10 gram sample of this isotope remaining after 20 days is: w) 0.312 grams x) 0.625 grams y) 1.25 grams z) 2.50 grams
Last Answer : ANSWER: X -- 0.625 GRAMS
Description : Carbon l4 with a half life of 5,568 years is used to date a sample of wood. The sample has l/8 the carbon l4 contained in a living tree of the same species. Approximately how old is the specimen?
Last Answer : ANSWER: l6,704 YEARS
Description : 1. Who has the final power to maintain order within the House of People ? 2. X210 has half life of 5 day. What is the time taken for seven-eights of sample of X210 to decay? 3. What is ... an important condition for growth of coral? 20. Where was the Arya Samaj setup for the first time in 1875 ?
Last Answer : Answer : 1. Speaker 2. 15 days 3. A drilling ship in Bombay High 4. U.S.A. 5. Cotton textiles 6. Bachendri Pal 7. Nodulated root 8. President 9. Chile 10. Nur Jahan 11. 5 12. ... coast 15. Dayanand Saraswati 16. Chloramphenical 17. Lord Ripon 18. Helium nuclear 19. Wave-free salt water 20. Bombay
Description : Is it hypocritical when parents who have done illegal drugs in their lives (I'd bet half the population has tried something illegal) tell their kids "Don't do drugs?"?
Last Answer : No.
Description : A man has 3 wife's, each one has 3 houses, in one of houses for every wife his mother in law lives. He goes to first house with money, mother doubles it, he leaves half, he goes to second wife, ... with no money. How much money did he have? 2 wife are sister and they have a same mother? -Riddles
Last Answer : This answer was deleted by moderators
Description : Consider the following decay series: `A to B to C to D` Where, A,B and C are radioactive elements with half lives of 4,5 sec, 15 days and 1 sec respec
Last Answer : Consider the following decay series: `A to B to C to D` Where, A,B and C are radioactive elements with half ... mol of C, 1/4 mol of D and noen of A
Description : Two radioactive elements X and Y have half lives 6 min and 15 min respectively. An experiment starts with 8 times as many atoms of X as Y. how long it
Last Answer : Two radioactive elements X and Y have half lives 6 min and 15 min respectively. An experiment starts with 8 times ... B. 12 min C. 48 min D. 30 min
Description : A radioactive element `X`, decays by the sequence and with half-lives, given below, `X underset(30"min")overset(alpha)(rarr) Y underset(2"days")overse
Last Answer : A radioactive element `X`, decays by the sequence and with half-lives, given below, `X underset(30"min" ... D. The mass number of Y is greater than X
Description : Are all half-lives the same between different element?
Last Answer : No. Some only last a tiny fraction of a second, some lasthundreds of thousands of years.
Description : What did how the other half lives lead to?
Description : What is the How the Other Half Lives book about?
Last Answer : Type youC.The Drexel Committee checked to see whether tenements were safe....
Description : Vasopressin and oxytocin circulate unbound to proteins and have very short plasma half lives, on the order of (A) 1–2 minutes (B) 2–4 minutes (C) 5–8 minutes (D) 10–12 minutes
Last Answer : Answer : B
Description : When compared to unfractionated heparin, low molecular weight heparins have (a) Preferential binding affinity to factor Xa relative to Iia (thrombin) (b) Shorter half-lives (c) Dose – dependent renal clearance
Last Answer : Ans: A
Description : When the same dose of a drug is repeated at half life intervals, the steady-state (plateau) plasma drug concentration is reached after: A. 2–3 half lives B. 4–5 half lives C. 6–7 half lives D. 8–10 half lives
Last Answer : B. 4–5 half lives
Description : Half of the people of the Commonwealth lives in __________ (A) India. (B) the USA. (C) Great Britain. (D) Canada.
Last Answer : (A) India.
Description : In a spent fuel assembly, the radioactive elements having the longest half-lives are the: w) fission products x) actinides y) activation products z) radioisotopes of lead
Last Answer : ANSWER: X -- ACTINIDES
Description : A sample with excess Ar40 and atmosphere Are given an apparent age that is younger or older than the real age? why?
Last Answer : Homework questions are not really allowed here, on this site. Maybe someone will chime in, to say how you can go about finding the answer, but that’s about it. No straight answers.
Description : What do you think those in late middle age should do with their lives?
Last Answer : I don’t think the issue is related to age and I’ll leave it at that.
Description : Human population growth is greatest in developing countries because ? A. the birth rate is high in developing countries (Answer) B. the death rate is high in developing countries. C. much of ... reached the child bearing age. D. most of the world's population lives in industrialized countries.
Last Answer : A. the birth rate is high in developing countries (Answer)
Description : There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said the Madam. 'No it's not,' says the man. 'It's less than half full.' ... any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct? -Riddles
Last Answer : Tilt the barrel until the wine barely touches the lip of the barrel. If the bottom of the barrel is visible then it is less than half full. If the barrel bottom is still completely coverd by the wine, then it is more than half full.
Description : There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct? -Riddles
Last Answer : Tilt the barrel until the wine barely touches the lip of the barrel. If the bottom of the barrel is visible then it is less than half full. If the barrel bottom is still completely covered by the wine, then it is more than half full.
Description : How would you determine the half-life of an unknown element?
Description : Determine the lower half-power frequency of a class-C amplifier having upper half-power frequency of 10.025 MHz, a resonant frequency 5 MHz and a circuit Q of 10. A. 1.0025 MHz B. 10.525 MHz C. 0.5 MHz D. 10 MHz
Last Answer : A. 1.0025 MHz
Description : The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order. A) Zero (B) First (C) Second (D) None of these
Last Answer : (C) Second