2-3 weeks // Radphysics

Question 1

Anything that occupies space and has form or shape

Answer 1

Matter

Question 2

Quantity of matter contained in any physical object

Answer 2

Mass

Question 3

Force exerted by a body under the influence of gravity

Answer 3

Weight

Question 4

It is the ability to do work

Answer 4

Energy

Question 5

It is the law that states that energy may be transformed from one form to another, but it cannot be created or destroyed

Answer 5

Law of Conservation

Question 6

Type of energy that has ability to do work by virtue of position

Answer 6

Potential Energy

Question 7

It is the energy of motion

Answer 7

Kinetic Energy

Question 8

It is the energy released by a chemical reaction

Answer 8

Chemical Energy

Question 9

It is the energy that represents the work that can be done when an electron moves through an electric potential difference (voltage)

Answer 9

Electrical Energy

Question 10

It is the energy of motion at the molecular level.

Answer 10

Thermal Energy

Question 11

It is the energy that is contained within the nucleus of an atom.

Answer 11

Nuclear Energy

Question 12

It is the energy emitted and transferred through matter.

Answer 12

Radiation

Question 13

It is capable of removing an orbital electron from an atom with which it interacts.

Answer 13

Ionizing Radiation

Question 14

In basic radiation protection, it is usually aluminum that is inserted into x-ray tube housing so that low energy x-rays emitted by the tube are absorbed before they can reach the patient.

Answer 14

Filtration

Question 15

In basic radiation protection, it restricts the useful beam to that part of the body requiring examination and thereby spares adjacent tissue from unnecessary exposure.

Answer 15

Collimation

Question 16

This screen reduces the exposure of the patient to x-rays by more than 95% compared with examination without it.

Answer 16

Intensifying Screen

Question 17

In radiologic units, it is the radiation exposure or intensity and it is measured in c/kg or roentgen

Answer 17

Air Kerma

Question 18

In radiologic units, it is the amount of energy deposited or absorbed per kilogram of tissue and it is measured in Gray or Rad

Answer 18

Absorbed Dose

Question 19

In radiologic units, it express the quantity of radiation received by radiation workers and it is measured in Sieverts or Rem

Answer 19

Dose Equivalent

Question 20

In radiologic units, it is the unit of the quantity of radioactive material and not the radiation emitted by that material and it is measured by Becquerel or Curie

Answer 20

Radioactivity

Question 21

In fundamental of physics, it is sometimes called speed. It measures how fast something is going or the rate of change of its position with time.

? = d/t

Answer 21

Velocity

Question 22

In Newton’s laws of motion, it is the law that states when a body will remain at rest or continue moving with a constant velocity in a straight line unless acted on by an external force.

Answer 22

Law of Inertia

Question 23

In Newton’s laws of motion, it is the push or pull on an object. It is the law that states that the force applied to move an object is equal to the mass of the object times the acceleration.

F = ma

Answer 23

Law of Force

Question 24

In Newton’s laws of motion, it states that in every action, there is an equal and opposite reaction.

Answer 24

Law of Action/Reaction

Question 25

In fundamental of physics, it is a force on a body caused by the downward pull of gravity on it. ? = mg

Answer 25

Weight

Question 26

In fundamental of physics, it is the product of the mass of an object and its velocity, represented by p. The greater the velocity of an object, the more ? the object possesses. p = mv

Answer 26

Momentum

Question 27

In fundamental of physics, it is the force applied times the distance over which it is applied. ? = Fd

Answer 27

Work

Question 28

In fundamental of physics, it is the rate of doing work ? = Work/t

Answer 28

Power

Question 29

The four substances of matter.

Answer 29

Earth, Water, Air and Fire

Question 30

The four essences of matter.

Answer 30

Wet, Dry, Hot and Cold

Question 31

According to him, an element was composed of identical atoms that reacted the same way in chemical reactions. All oxygen atoms were alike, constructed alike and reacted alike. Physical combination of one type of atom with another was visualized as being an hook and eye affair.

Answer 31

John Dalton

Question 32

He described the atom as plum and pudding, where the plum represents negative electric charges and the pudding was a shapeless mass of positive electrification.

Answer 32

J.J Thomson

Question 33

He disproved Thomson's model of an atom and introduced the nuclear model.

Answer 33

Ernest Rutherford

Question 34

He improved Rutherford's description of the atom and introduced the miniature solar system in which the electrons revolved about the nucleus in prescribed orbits or energy levels.

Answer 34

Niel's Bohr

Question 35

In x-ray interaction with matter, it is sometimes called Coherent or Thompson Scattering where incident photons interacts with a target atom, causing it to become excited. No energy transferred and therefore no ionization.

Answer 35

Classical Scattering

Question 36

In x-ray interaction with matter, it occurs between moderate energy x-rays and outer shell electrons. It results in ionization of the target atom, change in photon direction and reduction of photon energy.

Answer 36

Compton Effect

Question 37

In x-ray interaction with matter, the incident x-ray interacts with the inner shell electron and the result is total x-ray energy is totally absorbed. Characteristic X-rays are produced.

Answer 37

Photoelectric Effect

Question 38

In x-ray interaction with matter, the incident x-ray interacts with the nuclear force field and the results is x-ray disappears and two electrons with opposite charge appear.

Answer 38

Pair Production

Question 39

In x-ray interaction with matter, the incident x-ray interacts directly into the nucleus and the results is x-ray is absorbed by the nucleus and nucleon fragment is emitted.

Answer 39

Photodisintegration