COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 28, Problem 45QAP
To determine
The shortest
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The amount of meat in prehistoric diets can be determined by measuring the ratio of the isotopes nitrogen-15 to nitrogen-14 in bone from human remains. Carnivores concentrate 15N15N, so this ratio tells archaeologists how much meat was consumed by ancient people. Suppose you use a velocity selector to obtain singly ionized (missing one electron) nitrogen atoms of speed 8.50 km/skm/s and bend them along a semicircle within a uniform magnetic field. The 14N14N atoms travel along a semicircle with a diameter of 32.2 cmcm. The measured masses of these isotopes are 2.32×10−26kg2.32×10−26kg (14N14N) and 2.49×10−26kg2.49×10−26kg (15N15N).
Part A.
Find the separation of the 14N14N and 15N15N isotopes at the detector.
Express your answer with the appropriate units.
Assume a lightbulb converts all of its energy to green light (this is not true, some is lost as heat). If the lightbulb is 60W, how many photons would it produce in 60s? Assume a wavelength for green light of 532nm. Hint: replace f in the photon energy equation with c/lambda
What are the shortest-wavelength X-rays emitted byelectrons striking the face of a 28.5-kV TV picture tube?What are the longest wavelengths?
Chapter 28 Solutions
COLLEGE PHYSICS
Ch. 28 - Prob. 1QAPCh. 28 - Prob. 2QAPCh. 28 - Prob. 3QAPCh. 28 - Prob. 4QAPCh. 28 - Prob. 5QAPCh. 28 - Prob. 6QAPCh. 28 - Prob. 7QAPCh. 28 - Prob. 8QAPCh. 28 - Prob. 9QAPCh. 28 - Prob. 10QAP
Ch. 28 - Prob. 11QAPCh. 28 - Prob. 12QAPCh. 28 - Prob. 13QAPCh. 28 - Prob. 14QAPCh. 28 - Prob. 15QAPCh. 28 - Prob. 16QAPCh. 28 - Prob. 17QAPCh. 28 - Prob. 18QAPCh. 28 - Prob. 19QAPCh. 28 - Prob. 20QAPCh. 28 - Prob. 21QAPCh. 28 - Prob. 22QAPCh. 28 - Prob. 23QAPCh. 28 - Prob. 24QAPCh. 28 - Prob. 25QAPCh. 28 - Prob. 26QAPCh. 28 - Prob. 27QAPCh. 28 - Prob. 28QAPCh. 28 - Prob. 29QAPCh. 28 - Prob. 30QAPCh. 28 - Prob. 31QAPCh. 28 - Prob. 32QAPCh. 28 - Prob. 33QAPCh. 28 - Prob. 34QAPCh. 28 - Prob. 35QAPCh. 28 - Prob. 36QAPCh. 28 - Prob. 37QAPCh. 28 - Prob. 38QAPCh. 28 - Prob. 39QAPCh. 28 - Prob. 40QAPCh. 28 - Prob. 41QAPCh. 28 - Prob. 42QAPCh. 28 - Prob. 43QAPCh. 28 - Prob. 44QAPCh. 28 - Prob. 45QAPCh. 28 - Prob. 46QAPCh. 28 - Prob. 47QAPCh. 28 - Prob. 48QAPCh. 28 - Prob. 49QAP
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