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Radt 1303 Physics > Chapter 1 Exam > Flashcards

Chapter 1 Exam Flashcards

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1
Q

Who was discovered x-rays and was credited for it?

A

Dr. Wilhelm Roentgen

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2
Q

What was used during the discovery of x-rays?

A

Crookes cathode ray tube

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3
Q

When was the first x-ray image taken?

A

December 22, 1895

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4
Q

Who devised fluoroscope for real-time x-ray?

A

Thomas Edison

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5
Q

Who was the first fatality from x-ray?

A

Clarence Daily

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6
Q

What does ALARA stands for?

A

as low as reasonably achievable

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7
Q

quality/penetration/power
reduced patient dose

A

kVp

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8
Q

quantity (how many x-rays)
increased patient dose

A

mAs
mAs x time = # of x-rays (mass)

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9
Q

What are the fundamental quantities?

A

mass, length, time

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10
Q

What are derived quantities?

A

velocity, acceleration

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11
Q

What are the radiologic quantities?

A

Roentgen (R)

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12
Q

What is the term for radiation burns?

A

acute radiodermatitis

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13
Q

radiation with sufficient energy to ionize atoms

A

ionizing radiation

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14
Q

equal to distance traveled, divided by the time necessary to cover that distance

A

velocity

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15
Q

formula & unit of measure for velocity

A

v = d/t
meters per second squared (m/s^2)

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16
Q

found by subtracting the initial velocity of an object from its final velocity and dividing that value by the time used

A

acceleration

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17
Q

formula & unit of measure for acceleration

A

a = (Vf - Vo) / t
meters per second squared (m/s^2)

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18
Q

a push, a pull, or other action that changes the motion of an object. it is equal to the mass of the object multiplied by the acceleration

A

force

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19
Q

formula & unit of measure for force

A

F = ma
meters per second squared (m/s^2)

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20
Q

equal to the mass of the object multiplied by its velocity

A

momentum

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21
Q

formula & unit of measure for momentum

A

p = mv
kilograms-meter per second (kg-m/s)

22
Q

an expression of the force applied to an object multiplied by the distance across which it is applied

A

work

23
Q

formula & unit of measure for work

A

work = Fd
joule (J)

24
Q

equal to work divided by time during which work is done

A

power

25
Q

the property of an object with mass that resists a change in its state of motion. mass is a measure of the amount of inertia that a body possesses

A

inertia

26
Q

simply the ability to do work

A

energy

27
Q

energy in a stored state; ability to do work by virtue of state or position

A

potential energy

28
Q

energy being expended; act of doing work

A

kinetic energy

29
Q

a form of energy that exists as an electrical and magnetic disturbance in space

A

electromagnetic energy

30
Q

a measure of the number of electrons liberated by ionization per kilogram of air

A

Coulomb/kilogram (C/kg)

31
Q

the unit for absorbed dose

A

Gray (Gy)

32
Q

used to quantify occupational exposure or dose equivalent

A

Sievert (Sv)

33
Q

used to quantify radioactivity

A

Becquerel (Bq)

34
Q

Rad

A

radiation absorbed dose

35
Q

Rem

A

radiation equivalent man

36
Q

what does Kerma stand for?

A

kinetic energy released per unit mass

37
Q

What is Kerma?

A

used to describe the quantity of radiation of released in air

38
Q

what is the unit measure for Kerma?

A

Joules/kg or Gray (Gy)

39
Q

What are the two electrodes used in the x-ray tube?

A

anode (positive, over head of table)
cathode (negative, over foot of table)

40
Q

What is the date of the discovery of x-rays?

A

November 8, 1895

41
Q

A radiographer’s dosimetry report is expressed in:

A

mSv

42
Q

According to the basic principles of radiation protection, a radiographer should minimize:

A

time

43
Q

Anything that occupies space and has shape or from is:

A

matter

44
Q

What is the radiation intensity that will produce 2.08 x 10^9 ion pairs in 1cm^3 of air?

A

roentgen (R)

45
Q

What is the work done if 35 N of force is applied to move a patient 0.5m?

A

17.5 J

46
Q

The curie is an expression of:

A

Quantity of radioactive material

47
Q

X-ray examinations of the lower abdomen and pelvis of women in reproductive years should be limited to:

A

The 10 days after onset of menstruation

48
Q

What is the power used if 2000 J of work is applied for 5 seconds?

A

400 W

49
Q

What is the velocity of a car if it travels 1000 meters in 4 seconds?

A

250 m/s

50
Q

formula & unit of measure for power

A

P = work/t
watts (W)

Radt 1303 Physics (8 decks)

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