# Rad Physics 1

 What is the primary distinquishing charateristic of matter? It has mass. How is mass measured? In kilograms(kg). Define matter. Anything that occupies space and has mass Define Energy The ability to do work. The tranfer of energy is ________. radiation The removal of an electron from an atom is called _____. ionization X-rays, gamma rays, and ultraviolet light are forms of ___________. electromagnet radiation. The largest source of enviornmenal radiation. radon What percentage of our annual radiattion dose is due to medical imaging? 51% What was the name of the partially evacuated  glass tube that Roentgen was experimentig with when he discovered x-rays Crookes tube The fluorescent material used to coat the xray plate discovered accidently by Roentgen barium platinocyanide a roentgen(R) is called a __________ in SI units and it measures_______. air kerma  (Gya), exposure J/kg a rad is called a ____________ in SI units and measures_________. gray(Gyt), absorbed dose rad stands for: radiation absorbed dose A curie(Ci) is called a ______ in SI  units and measures ________. becquerel, radioactivity A rem is called a ________ in SI units and measures __________. sievert, effective dose (often used for occupational radiation monitoring) What is a derived quantity? In physics there are three base quantities: mass, length, and time which are the building blocks of all other quantities. The derived quantities are a combination of one or more of the three base quantities.Examples: length cubed=volume, length/time =velocity What does rem stand for? radiation equivalent manmeasures effective doseSI unit:Sievert(Sv)(some places I've seen Roentgen Equivalent Man) ___________ is the kinetic energy of molecules. Heat _________is the rate of doing work. Power Work /time  or the rate of doing work is __________. Power (the rate of doing work) The unit of work Joule(J) the SI unit for Power joule/second   J/s _____________is the kinetic energy transferred from photons to electron during ionization and excitation. Air Kerma(Kinetic energy released in mattter) Gya _______is the quantity of matter as described by it's energy equivalence. mass Energy is measured in joules (j) Energy emitted and transferred through space is called _________. radiation Natural enviornmental radiation results in an annual dose of approximately___________. 3 mSv Of the three principle radiation controls: time, distance, and shielding, which is most important? shielding Radiation exposure is measured in Special units:_____________  and SI units_____________________. C/kg(coulumb/kg), Air kerma(Gya) (old unit the roentgen(R) ) Radiation dose is measured in Special units:_______________and SI units_____________________. J/kg,  Gray(Gyt) (old unit rad) Effective dose is masured in Special units:________________and SI units_____________________. J/kg,    Sieverts(Sv) (old unit rem) The mass of an object times it's velocity is it's ____________. momentump=mv Resistance to change in motion is_______________. inertia ____________is the ability to do work. energy The force required to change the state  of motion of an object is ______ proportional to the product of the _____ and the ____________. directly, mass, accelerationF = ma.NEWTON'S 2ND LAW For every action there is an _______and_________ reaction. equal,oppositeNEWTON'S 3RD LAWACTION/REACTIONExample:if we step off a boat onto the bank of a lake: as we move in the direction of the shore, the boat tends to move in the opposite direction (leaving us facedown in the water, if we aren't careful!). Which Newton's law does this illustrate? Newton's 2nd lawthe law of force Which Newton law does this illustrate? Newton's 1st lawThe law of inertia what is constant and is symbolized by C:C=3x10^8 m/s? Velocity of light a weight lifted through a height is _______. WORK    SI unit is joules(J) W=fd    force is expressed in Newtons and distance in Meters joule per second J/s power The equation for power is___________and the SI unit is___________. P=fd/t         which is the same as work divided by time force(newtons) times distance(meters) =work(joules) divided by time in seconds SI unit: J/s Describe three kinds of heat transfer illlustrated in this picture. What does ALARA  stand for? Particulate and electromagnetic radiation emitted by the sun and stars are called _______. cosmic rays The ejected electron and the resultant positively charged atom is called the _______. ion pair What are the three components of natural environmental radiation? Cosmic rays terrestrial radiation  internally deposited radionucli terrestrial radiation results from deposits of uranium, thorium, and other radionuclides in the Earth unit that applies only to x-rays and gamma rays and their interactions with air Roentgen(R) A major source of radon is________. granite fast-moving particles capable of ionization alpha and beta particles AuthorRadTherapy ID172201 Card SetRad Physics 1 DescriptionRad Physics Chapter 1 Updated2012-09-21T04:27:50Z Show Answers