# Physics I final

## Terms

copy deck
What are the units of exposure in air?
Columbs/kilogram of air
or
Roentgen
What are the units of absorbed dose?
What are the units of dose equivalent?
Sievert and Rem
Does gravity affect mass?
No
What is the formula for calculating the number of electrons in an electron shell?
2n(squared)
How many electrons are in the L shell of an atom?
8
How many electrons can be in the outermost shell of an elecron?
8
What is the term for the amount of energy needed to remove an elecrton from an atom?
Binding energy
What is the binding energy of the K shell of a Tungsten atom?
70 kev
What is the binding energy of the L shell of a Tungsten atom?
11 kev
What is atomic number? What is the symbol for atomic number?
The number of protons in an atom
Z
What is mass number? What is the symbol for mass number?
The number of protons and nuetrons in an atom
A
What is an isotope?
Atoms of the same element that have a different number of electrons
What is ionization?
Removal or addition of an electron from an atom
What is the ability to do work?
Energy
Name the seven forms of energy.
Potential, kinetic, thermal, chemical, electrical, nuclear, and electromagnetic
What type of energy is released when a wave is absorbed?
Electromagnetic
What is the velocity of electromagnetic radiation?
Speed of light
What is the symbol for the speed of light? How fast is the speed of light?
c
186,000 miles/s; 3x10(8)m/s;
3x10(10)cm/s
What is wavelength?
The distance between one point on a wave and the same point on the next wave
What is frequency?
Number of waves per second
How are frequency and wavelength related?
Inversely related
What is the formula for velocity?
Velocity = frequency x wavelength
Who discovered x-rays and when?
Wilhelm Conrad Roentgen on November 8, 1895
True or false. X-rays all have the same energy and wavelength.
False
True or false. X-rays all have the same velocity.
True
Can you focus x-rays with a lens?
No
What is the study of the distribution of charged particles?
Electrification
In what 3 ways may an object be electrified?
Friction, contact, and induction

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