W/L Ch 13 Physics Quiz Flashcards
AMU is an abbreviation for which of the following?
a. Atomic metric unit
b. Atomic measured unit
c. American metric unit
d. Atomic mass unit
d. Atomic mass unit
How many seconds are there in 3 hours and 20 seconds?
a. 200
b. 10,800
c. 10,820
d. 1082
c. 10,820
60sec x 60min = 3,600 sec 3,600 sec x 3 hrs 10,800 seconds \+ 20 seconds = 10,820 seconds
The force responsible for interaction between particles with a nonzero mass and having infinite range is _________________.
a. electromagnetic
b. gravity
c. weak force
d. strong force
b. gravity
Who proposed the first model of the atom?
a. Bohr
b. Thomson
c. Rutherford
d. Planck
b. Thomson
J. J. Thomson’s first model of the atom was a raisin-bread, or plum-pudding, model.
An electron’s binding energy is the amount of energy required to remove that electron from the atom and is usually measured in __________.
a. MeV
b. keV
c. Coulombs
d. kilograms
b. keV
The electron binding energy has a negative value and is usually measured in kiloelectron volts, or keV.
If sufficient energy is given to the atom, one or more electrons of the atom can overcome their binding energy and can be completely removed from the atom. This process is called __________________.
a. ionization
b. excitation
c. nuclear force
d. frequency
a. ionization
When some energy is imparted to the electrons of the atom, they will move to higher energy empty states. This process is called which of the following?
a. Ionization
b. Excitation
c. Nuclear force
d. Frequency
b. Excitation
Excitation takes place when some energy is imparted to the electrons of the atom, causing the electrons to move to higher-energy states, called excited states, and the atom will then reach an unstable state.
The number of protons and neutrons in the nucleus is known as _______________.
a. atomic weight
b. strong force
c. atomic mass number
d. nuclear stability
c. atomic mass number
Which statement is not true?
a. The nucleus of the atom consists of protons and neutrons.
b. Protons and photons are collectively called nucleons.
c. Protons are positively charged particles.
d. Neutrons are neutral with no electric charge.
b. Protons and photons are collectively called nucleons.
Protons and “neutrons” are considered nucleons.
Nuclear binding energy is measured in which of the following?
a. keV
b. Amu
c. MeV
d. Coulombs
c. MeV
Nuclear binding energy is measured in MeV, or mega-electron volts.
The speed of light is _______________.
a. 3 x 10^10 m/sec
b. 3 x 10^8 m/min
c. 3 x 10^10 m/min
d. 3 x 10^8 m/sec
ANS: D
The unit for frequency is 1/sec, called the _________________.
a. lambda
b. Hertz
c. meter
d. angstrom
b. Hertz
Wavelength is represented by ______________.
a. lambda
b. Hertz
c. inch
d. second
a. lambda
𝞴
The metric system, or SI, unit of energy is ________________.
a. Hertz
b. meter
c. joule
d. angstrom
c. joule
The metric system, or SI, unit of energy is the joule and is equivalent to 1 kg x m^2/sec^2.
One curie (1Ci) equals which of the following?
a. 3.8 x 10^8 dis/sec
b. 3.7 x 10^8 dis/sec
c. 3.7 x 10^10 dis/sec
d. 3.8 x 10^10 dis/sec
c. 3.7 x 10^10 dis/sec
1Ci = unit of radioactivity
A mCi (millicurie) equals which of the following?
a. 10^3 Ci
b. 10^–3 Ci
c. 10^–6 Ci
d. 10^6 Ci
b. 10^–3 Ci
A radioactive sample is measured to contain 1,000 mCi of radioactivity. If the decay constant of this isotope is 0.105 h^r-1, how much activity will remain after 48 hours?
a. 6.474 mCi
b. 7.368 mCi
c. 0.154 mCi
d. 15.445 mCi
a. 6.474 mCi
A^t = Aoe^–𝞴 t
= (1000 mCi)e^(–0.105)(48)
= 6.474 mCi.
The condition in which the half-life of the parent isotope is much greater than the half-life of the daughter isotope is called __________________.
a. transient equilibrium
b. transient attenuation
c. secular attenuation
d. secular equilibrium
d. secular equilibrium
The thickness of some added material required to reduce beam intensity to half its original value is called the __________________.
a. half-life
b. inverse square factor
c. half-value layer (HVL)
d. intensity coefficient
c. half-value layer (HVL)
Which of the following is the most common photon interaction that occurs in the energy range used in radiation therapy?
a. Photoelectric
b. Compton
c. Photodisintegration
d. Thomson
b. Compton
The smallest unit of an element that retains the properties of that element is known as a(n) _________________.
a. molecule
b. quark
c. hadron
d. atom
d. atom
There are four major quantities that are important in radiation physics. They are radiation exposure, radiation absorbed dose, radiation dose equivalent, and ________________.
a. radioactivity
b. magnetism
c. electromagnetism
d. frequency
a. radioactivity
Rest mass refers to the _______ of a particle when it is not moving.
a. energy
b. charge
c. force
d. weight
d. weight
The coulomb is the metric unit of electrical ______________.
a. mass
b. charge
c. energy
d. frequency
b. charge
A beta minus particle is also known as a(n) ____________.
a. electron
b. proton
c. hadron
d. neutron
a. electron
