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Unformatted text preview: be detected, expressed in scientific notation,
is b × 10w Hz. The value of b is __________.
(Record your three-digit answer in the numerical-response section on the answer sheet.) 30. Two scientists who conducted experiments that led to the determination of the
mass of an electron were
D. 31. In the photoelectric equation, the symbol W represents the
D. 32. Planck and Einstein
Rutherford and Bohr
Thomson and Millikan
Compton and de Broglie energy gain of the target metal
wavelength of the incident radiation
maximum wavelength of an emitted electron
minimum energy required to release an electron from a metal Violet light striking the negative electrode in a phototube causes a current to flow
in the tube. Under the same conditions, another form of light that will always
cause a current to flow is
ultraviolet 19 33. A photon of UV-B light with a wavelength of 2.90 × 10–7 m strikes an electron in
a hydrogen atom in its ground state. As a result, the electron will
D. be raised to energy level 2
be raised to energy level 3
be raised to energy level 5
not be raised to a higher energy level Use the following information to answer the next question.
Maximum Kinetic Energy of Photoelectrons as a Function
of Incident Electromagnetic Frequency
32 Maximum kinetic energy (10 –19 J) 28
0 1 2 3 4 5 6 7 15 Frequency (10 Hz) 34. The work function of the material emitting the photoelectrons is
A. 2.0 × 1015 J B. 1.3 × 10–18 J C. 6.6 × 10–34 J D. 0.0 J 20 8 Use the following information to answer the next three questions.
Some smoke detectors use the radioactive source americium-243 to ionize the
air between two electric plates in a detection chamber. A 9.0 V battery in the
detector causes a continuous current to flow between the plates. When smoke
particles enter the chamber, they neutralize the ionized air molecules, which
decreases the current and triggers an alarm.
35. Typically, the 9.0 V battery used in this type of detector will transfer 200 C of
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This note was uploaded on 01/14/2014 for the course PHYSICS Physics 30 taught by Professor Quinlan during the Fall '09 term at Centennial High School.
- Fall '09