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$\bullet$ Ancient meat eating. The amount of meat in prehistoric diets can be determined by measuring the ratio of the isotopes nitrogen-15 to nitrogen-l4 in bone from human remains. Carnivores concentrate $^{15} \mathrm{N},$ so this ratio tells archaeologists how much meat was consumed by ancient people. Use the spectrometer of the previous problem to find the separation of the 14 $\mathrm{N}$ and 15 $\mathrm{N}$ isotopes at the detector. The measured masses of these isotopes are $2.32 \times 10^{-26} \mathrm{kg}(14 \mathrm{N})$ and $2.49 \times 10^{-26} \mathrm{kg}$ $\left(^{15} \mathrm{N}\right) .$

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Physics 101 Mechanics

Physics 102 Electricity and Magnetism

Chapter 20

Magnetic Field and Magnetic Force

Motion Along a Straight Line

Motion in 2d or 3d

Electric Charge and Electric Field

Gauss's Law

Current, Resistance, and Electromotive Force

Direct-Current Circuits

Magnetic Field and Magnetic Forces

Sources of Magnetic field

Electromagnetic Induction

Inductance

University of Michigan - Ann Arbor

Simon Fraser University

Hope College

Lectures

18:38

In physics, electric flux is a measure of the quantity of electric charge passing through a surface. It is used in the study of electromagnetic radiation. The SI unit of electric flux is the weber (symbol: Wb). The electric flux through a surface is calculated by dividing the electric charge passing through the surface by the area of the surface, and multiplying by the permittivity of free space (the permittivity of vacuum is used in the case of a vacuum). The electric flux through a closed surface is zero, by Gauss's law.

04:28

A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H. The term "magnetic field" is often used to refer to the B field. In a vacuum, B and H are the same, whereas in a material medium, B is a component of H. In the latter case, H is the "magnetic field strength", and B is the "magnetic flux".

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Ancient Meat Eating. The a…

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The amount of meat in preh…

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The amount of meat in …

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Calculate the $\mathrm{n} …

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Two radioactive isotopes i…

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Use the formula derived in…

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The age of some animal bon…

we have mass of the carbon 12 for the mass spectrograph that is equals to 1.99 multiplied by 10 to the power minus 26. Casey, okay. And radius of the carbon 12 at the mass spectrometer is obtained as 12.5 centimeters. So yeah, the Radius is given as MV QB, where m is mass and we easy speed Q is charged and we use magnetic fields. So from here, we get are directly proportional to small m. Okay, so are directly proportional to small. And so from here we can right R 14 equals two r 12 multiplied by m 14 over by M 12. So by putting values radius of networks and 14, that is our 14 equals to 12.5 multiple away. M 14 is two point 32 multiplayer bait and to the power managed 26 kz and a mass of carbon 12 that is 1.99 multiplied by 10 to the minus 26. So from here, radius of NATO's and 14 is obtained as 14.6 centimeters now, Similarly, we can calculate the radius of nitrogen 15 and this will be equals two radius of Radius R 15 equals two three years of carbon 12 multiplied by mass of nitrogen 15 divided by mass of carbon 12. So we're putting values radius of nitrogen 15, that is our 15 will be close to 12.5, multiplied by 2.49 multiplied by 10 to the power managed 26 kz divided by 1.99 multiplied by 10 to the power managed 26 kids. So from here radius of NATO's and 15 that is our 15 comes out to be 15.6 centimeters. So the separation d will be equals two two ar 15 minus r 14. So by putting values, D is equal to two times of 15.6 centimeters, minus 14.6 centimeters. So from here, D is equal to 2.0 centimeters. This is the answer for this question. Okay,

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