5.A lab has a new material they must test in order to determine its nature. Which test will determine whether the substance is a conductor, insulator, or semiconductor?

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter42: Molecules And Solids
Section: Chapter Questions
Problem 19P
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5.A lab has a new material they must test in order to determine its nature. Which test will
determine whether the substance is a conductor, insulator, or semiconductor?
O A. An infinitesimal potential difference is applied to the material; if it doesn't conduct, it is
an insulator.
O B. A potential difference is applied to the material, beginning with a very small one and
increasing to values equivalent to 5 eV. It can be identified based on when it begins to
conduct.
O C. A potential difference equivalent to 1 eV is applied; if the material conducts, it is a
semiconductor.
O D.
A potential difference is applied; if the material conducts, it is a conductor.
6.The equation E = mc is a famous result of special relativity. What is the difference between that
and the equation E = gmc??
O A.
The former is the total energy of a relativistic particle; the latter is the kinetic energy.
O B.
The former is the kinetic energy of a relativistic particle; the latter is the total energy.
The former is the rest energy of a relativistic particle; the latter is the total energy.
O D.
The former is the total energy of a relativistic particle; the latter is the rest energy.
9.A distant light source's light appears to Earth-based observers to be violet-shifted. What does it
say for an observer?
OA.
the Earth and source are moving towards each other, relatively speaking.
O B.
the Earth and source are moving away from each other, relatively speaking.
O C.
the source is moving towards the Earth as the Earth is moving away from the source.
O D.
the Earth is moving towards the source as the source is moving away from the Earth.
Transcribed Image Text:5.A lab has a new material they must test in order to determine its nature. Which test will determine whether the substance is a conductor, insulator, or semiconductor? O A. An infinitesimal potential difference is applied to the material; if it doesn't conduct, it is an insulator. O B. A potential difference is applied to the material, beginning with a very small one and increasing to values equivalent to 5 eV. It can be identified based on when it begins to conduct. O C. A potential difference equivalent to 1 eV is applied; if the material conducts, it is a semiconductor. O D. A potential difference is applied; if the material conducts, it is a conductor. 6.The equation E = mc is a famous result of special relativity. What is the difference between that and the equation E = gmc?? O A. The former is the total energy of a relativistic particle; the latter is the kinetic energy. O B. The former is the kinetic energy of a relativistic particle; the latter is the total energy. The former is the rest energy of a relativistic particle; the latter is the total energy. O D. The former is the total energy of a relativistic particle; the latter is the rest energy. 9.A distant light source's light appears to Earth-based observers to be violet-shifted. What does it say for an observer? OA. the Earth and source are moving towards each other, relatively speaking. O B. the Earth and source are moving away from each other, relatively speaking. O C. the source is moving towards the Earth as the Earth is moving away from the source. O D. the Earth is moving towards the source as the source is moving away from the Earth.
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