A physicist has developed a device that generates a beam of alpha particles each of which is a helium nucleus, consisting of two protons, two neutrons, and no electrons. The device ejects a steady stream of 2360 alpha particles per second. In order to test different shielding materials for a test chamber that will house the alpha particle generator, prepare a sheet of one potential material in an clectrically neutral state, mount it on a perfectly insulating stand, and fire the alpha particle device at it for 37.3 seconds. Afterward, the charge of the sheet is 5.46 x 10-15 C. Assume that none of the alpha particles bounced back from the sheet, meaning that the alpha particles were either captured by the shielding or penetrated completely through the shielding. What percentage of the alpha particles penetrated completely through the shielding material?

A physicist has developed a device that generates a beam of alpha particles each of which is a helium nucleus, consisting of two protons, two neutrons, and no electrons. The device ejects a steady stream of 2360 alpha particles per second. In order to test different shielding materials for a test chamber that will house the alpha particle generator, prepare a sheet of one potential material in an clectrically neutral state, mount it on a perfectly insulating stand, and fire the alpha particle device at it for 37.3 seconds. Afterward, the charge of the sheet is 5.46 x 10-15 C. Assume that none of the alpha particles bounced back from the sheet, meaning that the alpha particles were either captured by the shielding or penetrated completely through the shielding. What percentage of the alpha particles penetrated completely through the shielding material?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Rutherford's scattering experiment

Rutherford’s scattering experiment is also known as the gold foil experiment. This experiment disproved the plum pudding model of J.J. Thomson. In a gold foil experiment, high-energy alpha particles are made to strike a thin gold foil. The scattered alpha particles are detected using a detector. This experiment showed that the positive charge of the atom is at the center. Most of the atom’s mass is also confined to a small volume at the center. This region is known as the nucleus of the atom.

Question

A physicist has developed a device that generates a beam of alpha particles each of which is a helium nucleus, consisting of
two protons, two neutrons, and no electrons. The device ejects a steady stream of 2360 alpha particles per second.
In order to test different shielding materials for a test chamber that will house the alpha particle generator, prepare a sheet of
one potential material in an clectrically neutral state, mount it on a perfectly insulating stand, and fire the alpha particle
device at it for 37.3 seconds.
Afterward, the charge of the sheet is 5.46 x 10-15 C. Assume that none of the alpha particles bounced back from the sheet,
meaning that the alpha particles were either captured by the shielding or penetrated completely through the shielding. What
percentage of the alpha particles penetrated completely through the shielding material?

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