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Essentials of Radiographic Physics and Imaging 3rd Edition By James Johnston; Terri L. Fauber
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Essentials of Radiographic Physics and Imaging 3rd Edition By James Johnston; Terri L. Fauber
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Complete Test Bank Essentials of Radiographic Physics and Imaging 3rd Edition Johnston Questions & Answers with rationales (Chapter 1-17)
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Test Bank For Essentials of Radiographic Physics and Imaging3rd Edition By James Johnston; Terri L. Fauber
What is the unit of measure for velocity? - ANSWER: m/s
What is the formula for velocity ? - ANSWER: V=d/t (for example: 20 meters in 2
seconds =10 m/s)
What is the unit of measure of acceleration ? - ANSWER: m/s^2
What is the formula for Acceleration ? - ANSWER: a=(vf-vo)/t
What is velocity ? - ANSWER: is a measure of speed. distance traveled over time.
In radiologic sciences, x-rays have a constant velocity equal to the speed of light , or -
ANSWER: 3x10^8 m/s
what is force ? - ANSWER: is a push, a pull, or other action that changes the motion
of an object.
What is the unit of measure for force ? - ANSWER: newton (N)
what is the formula for force ? - ANSWER: F=ma (mass of an object times
acceleration)
What is momentum ? - ANSWER: is equal to the mass of the object multiplied by its
velocity
What is the formula for momentum ? - ANSWER: p=mv
What is the unit of measure for momentum ? - ANSWER: kilograms-meters per
second(kg-m/s)
what is work ? - ANSWER: is an expression of the force applied to an object
multiplied by the distance across which it is applied.
what is the formula for work ? - ANSWER: w=Fd
what is the unit of measure for work ? - ANSWER: joules (J)
What is Power ? - ANSWER: is equal to work divided by time during which work is
done.
what is the formula for power ? - ANSWER: P=work/t
, what is the unit of measure for power ? - ANSWER: watts(w)
What is inertia ? - ANSWER: is the property of an object with mass that resists a
change in its state of motion.
Newtons first law of motion states that - ANSWER: an object at rest will stay at rest
unless acted on by an external force.
What is energy ? - ANSWER: is simply the ability to do work.
What is potential energy ? - ANSWER: is energy in a stored state. It has the ability to
do work by virtue of state or position.
What is kinetic energy ? - ANSWER: is energy being expended. It is the act of doing
work
What are three forms of energy ? - ANSWER: electrical, chemical, and thermal.
what is electrical energy ? - ANSWER: is a form that is created by the flow of
electricity.
What is chemical energy ? - ANSWER: is a form that exists through chemical
reactions.
What is thermal energy ? - ANSWER: is a form of energy that exists because of
atomic and molecular motion.
What is Albert Eeinsteins formula? - ANSWER: E=MC^2 (energy equals mass times
constant)
What is Roentgen(R) international (SI) units ? - ANSWER: Coulomb/kilogram(c/kg)
ionization per kilogram of air, radiation intensity
what is the international (SI) units of rem ? (radiation equivalent man) - ANSWER: -
sievert.
-exposure or dose equivalent different types of ionizing radiation to which a
radiation worker may be exposed.
-occupational exposure
What is Rad? ( radiation absorbed dose) - ANSWER: SI=gray , patient dose
What is Curie ? - ANSWER: SI= Becquerel , radioactive material
X- ray tube what it contains ? - ANSWER: Cathode which is negative, Anode which is
positive ,
high voltage cobbs
Metal housing lined with lead, cooling fans and oil.
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