Johnny calculates from an experiment that he has 22 grams of carbon. However, he should have gotten 25 grams of carbon, which was the accepted value for this experiment. What was his percent error? •Remember: % Error =(EV-AV) x 100

Johnny calculates from an experiment that he has 22 grams of carbon. However, he should have gotten 25 grams of carbon, which was the accepted value for this experiment. What was his percent error? •Remember: % Error =(EV-AV) x 100

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter31: Radioactivity And Nuclear Physics

Section: Chapter Questions

Problem 55PE: Data from the appendices and the periodic table may be needed for these problems. What fraction of...

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Calculate the approximate number of atoms in a bacterium. Assume that the average mass of an atom in the bacterium is ten times the mass of a hydrogen atom. (Hint: The mass of a hydrogen atom is on the order of 10-27 kg and the mass of a bacterium is on the order of 10-15 kg.) Figure 1.28 This color-enhanced photo shows Salmonella typhimurium (red) attacking human cells. These bacteria are commonly known for causing foodborne illness. Can you estimate the number of atoms in each bacterium? (credit: Rocky Mountain Laboratories, NIAID, NIH)
How many times longer than the mean life of anextremely unstable atomic nucleus is the lifetime of a human?(Hint: The lifetime of an unstable atomic nucleus is on theorder of 10−22 s .)
Seawater contains 3 mg of uranium per cubic meter. (a) Given that the average ocean depth is about 4 km and water covers two - thirds of Earth’s surface, estimate the amount of uranium dissolved in the ocean. (b) Estimate how long this uranium could supply the world’s energy needs at the current usage of 1.5 x 1013 J/s. (c) Where does the dissolved uranium come from? Is it a renewable energy source? Can uranium from the ocean satisfy our energy requirements? Discuss. Note: Breeder reactors increase the efficiency of nuclear fuel use by approximately two orders of magnitude.
Questions deal specifically with hydrogen.As discussed in the video, so long as you’re using the constants from the PRC, these answers shouldtechnically have an infinite number of significant figures by the assumptions of the course. Report allof them to at least four significant figures to ensure full credit. As always, unless otherwise stated,numerical entry problems require the answer to be in units that are the SI standard for whateverquantity they’re measuring (lengths, for instance, are reported in m, notnm,μm, km, etc.). Convert tostandard units if necessary, but do not include the unit in the answer field.Remember that the way you can be positive Blackboard understands your numbers, if you choose towrite them in scientific notation, is to use “E” in place of “10^.” That is, if you find that a particularfrequency is1.234×1014Hz, it would be entered as1.234E14 1) Calculate the wavelength of thelight that creates thethird line in the Balmerseries.
Questions deal specifically with hydrogen.As discussed in the video, so long as you’re using the constants from the PRC, these answers shouldtechnically have an infinite number of significant figures by the assumptions of the course. Report allof them to at least four significant figures to ensure full credit. As always, unless otherwise stated,numerical entry problems require the answer to be in units that are the SI standard for whateverquantity they’re measuring (lengths, for instance, are reported in m, notnm,μm, km, etc.). Convert tostandard units if necessary, but do not include the unit in the answer field.Remember that the way you can be positive Blackboard understands your numbers, if you choose towrite them in scientific notation, is to use “E” in place of “10^.” That is, if you find that a particularfrequency is1.234×1014 Hz, it would be entered as 1.234E14 (no need to convert, Hz is the standardfrequency unit). 1) Calculate the frequency of the light that creates the first…
As shown in the pic, pls explain it step by step
Seawater contains 3 mg of uranium per cubic meter. (a) Given that the average ocean depth is about 4 km and water covers two-thirds of Earth’s surface, estimate the amount of uranium dissolved in the ocean. (b) Estimate how long this uranium could supply the world’s energy needs at the current usage of 1.5 × 1013 J/s. (c) Where does the dissolved uranium come from? Is it a renewable energy source? Can uranium from the ocean satisfy our energy requirements? Discuss. Note: Breeder reactors increase the efficiency of nuclear fuel use by approximately two orders of magnitude.
HI, CAN U PLS MAKE A DETAILED SOLUTION FOR THIS PROBLEM THANK YOU
One method for determining the age of ancient objects is by radiocarbon dating. Natural processes convert nitrogen to Carbon-14, a radioactive isotope with a half-life of 5730 years. When they are alive, animals assimilate Carbon-14 through the food chain. When an animal dies, it stops replacing its carbon and the amount of Carbon-14 decays exponentially. (a) Suppose the minimum detectable amount is 0.1% of the initial amount. What is the maximum age of a fossil that we could date using Carbon-14? (b) Suppose we wanted to date a fossil that was potentially 70 million years old. A radioactive isotope with what half-life would be required?
1. A stone is thrown vertically upward from the ground with an initial velocity of 128 ft/sec. How long it will take for the stone to reach the ground? 2. The rate of decay of radium is proportional to the amount present at any time. The half-life of radium is 1690 years and 20 mg of radium are present now. How much radium will remain after 1690 years?
10.A radioactive material, such as the isotope thorium-234, disintegrates at a rate proportional to the amount currently present. If Q(t) is the amount present at time t, then dQ/dt = −rQ, where r>0 is the decay rate. a.If 100 mg of thorium-234 decays to 82.04 mg in 1 week, determine the decay rate r. b.Find an expression for the amount of thorium-234 present at any time t. c.Find the time required for the thorium-234 to decay to one-half its original amount.
3. If a sample emits 2000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed when the detector is 3 meters from the sample? 4. Using the sample in question 3, how many counts per second would be observed when the detector is 10 meters away from the sample?