1) Why do you think MRI machines are designed for the pulse frequency to enter in resonance specifically with Hydrogen atoms? What other elements could theoretically work other than Hydrogen? 2) Gasoline-Electric hybrid vehicles like the Toyota Prius, have both electric and gasoline motors. How is the battery of the car charged if the car does not have a charging port? Hint: one component serves a dual purpose. 3) As discussed in class some birds and microorganisms have a "“magnetic" spatial sense. This means there are traces of certain elements on some parts of their nervous systems. Which of these elements could be? Which is the most likely one? 4) The instruments that measure rotational speed (RPM's) of a machine like cars are called Tachometers, and can tc be constructed with magnetic sensors or light sensors Squaring Circuit Photo Sensor Disk that measure a number of revolutions per minute. Is one approach better than the other? Comment on the advantages of optical vs magnetic rotational sensors LED Magnet Rotating Shaft

1) Why do you think MRI machines are designed for the pulse frequency to enter in resonance specifically with Hydrogen atoms? What other elements could theoretically work other than Hydrogen? 2) Gasoline-Electric hybrid vehicles like the Toyota Prius, have both electric and gasoline motors. How is the battery of the car charged if the car does not have a charging port? Hint: one component serves a dual purpose. 3) As discussed in class some birds and microorganisms have a "“magnetic" spatial sense. This means there are traces of certain elements on some parts of their nervous systems. Which of these elements could be? Which is the most likely one? 4) The instruments that measure rotational speed (RPM's) of a machine like cars are called Tachometers, and can tc be constructed with magnetic sensors or light sensors Squaring Circuit Photo Sensor Disk that measure a number of revolutions per minute. Is one approach better than the other? Comment on the advantages of optical vs magnetic rotational sensors LED Magnet Rotating Shaft

Modern Physics

3rd Edition

ISBN:9781111794378

Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Chapter15: Elementary Particles

Section: Chapter Questions

Problem 35P

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Similar questions

Integrated Concepts Estimate the density of a nucleus by calculating the density of a proton, taking it to be a sphere 1.2 fm in diameter. Compare your result with the value estimated in this chapter.
To obtain the most precise value of BE from the equation BE=[ZM(1H)+Nmn]c2m(AX)c2, we should take into account the binding energy of the electrons in the neutral atoms. Will doing this produce a larger or smaller value for BE? Why is this effect usually negligible?
Unreasonable Results The relatively scarce naturally occurring calcium isotope 48Ca has a halflife at about 21016y. (a) A small sample of this isotope is labeled as having an activity of 1.0 Ci. What is the mass of the 48Ca in the sample? (b) What is unreasonable about this result? (c) What assumption is responsible?
Integrated Concepts: (a) What temperature gas would have atoms moving fast enough to bring two 3He nuclei into contact? Note that, because both are moving, the average kinetic energy only needs to be half the electric potential energy of these doubly charged nuclei when just in contact with one another. (b) Does this high temperature imply practical difficulties for doing this in controlled fusion?
Construct Your Own Problem Consider a detector needed to observe the proposed, but extremely rare, decay of an electron. Construct a problem in which you calculate the amount of matter needed in the detector to be able to observe the decay, assuming that it has a signature that is clearly identi?able. Among the things to consider are the estimated half life (long for rare events), and the number of decays per unit time that you wish to observe, as well as the number of electrons in the detector substance.
When a nucleus (decays, does the (particle move continuously from inside the nucleus to outside? That is, does it travel each point along an imaginary line from inside to out? Explain.
Data from the appendices and the periodic table may be needed for these problems. Unreasonable Results (a) Repeat Exercise 31.57 but include the 0.0055% natural abundance of 234U with its 2.45105y halflife. (b) What is unreasonable about this result? (c) What assumption is responsible? (d) Where does the 234U come from if it is not primordial?
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Why is the number of neutrons greater than the number of protons in stable nuclei that have an A greater than about 40? Why is this effect more pronounced for the heaviest nuclei?
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Why is radon more closely associated with inducing lung cancer than other types of cancer?