RadTech: Physics - Ch .2
Terms
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- What is a Fraction?
- The numerical expression obtained by deviding one number into another.
- What are the three parts to a fraction?
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1. The numerator.
2. The denominator.
3. The Quotient. -
What is the S.I. System?
What is another name for it? -
System Internationale.
The Metric or MKS system. - Give four ways to represent numbers.
-
1. fractional.
2. Decimal.
3. Exponentional.
4. Logarithmic - What is the decimal system?
- Numbers grouped in multiples of ten.
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What is the Exponential system?
What is another name for it? -
A decimal number multiplied by 10 to an Nth power.
Scientific Notation. - What is the Logarithmic system?
- Numbers expressed as xponents of 10.
- What characteristic does a logarithmic scale have?
- It is non-linear and allows large ranges of values to be plotted.
- What is a linear scale?
- Equals lengths on the scale have equal value.
- What is an Ordered Pair?
- The two co-ordinates of a point such that it can be plotted on an X-Y graph.
- What is a ratio?
- The relation in degree or number between two similar things.
- What is a proportion?
- A statement of equality between two ratios. Four quantities, a, b, c, d, are said to be in proportion if a/b = c/d.
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What is the Symbol and Exponent for:
deka
hecto
kilo -
1. da 1
2. h 2
3. k 3 -
What is the Symbol and Exponent for:
mega
giga
tera -
1. M 6
2. G 9
3. T 12 -
What is the Symbol and Exponent for:
deci
centi
milli -
1. d -1
2. c -2
3. m -3 -
What is the Symbol and Exponent for:
micro
nao
pico -
1. u -6
2. n -9
3. p -12 -
What are the four Radiological units?
What are their symbols? -
1. The Roentgen. R
2. The Rad rad
3. The Rem rem
4. The curie Ci -
Give the SI unit names and symbol for:
1. The Roentgen.
2. The Rad
3. The Rem
4. The curie -
1. air kerma Gya
(grey in air)
2. grey Gyt
(in tissue)
3. sievert Sv
4. becquerel Bq - What is a Roentgen?
- The radiation intensity that will create 2.08 x 10⁸ ion pairs in 1 cc of air.
- What is a second way to define a Roentgen?
-
2.58 x 10⁻⁴ C/kg
coulombs of charge per kilogram of air - What is a Rad?
- 100 ergs per gram.
- What is a Curie?
- The quantity of radioactivity in which 3.7 x 10(10) nuclei disintegrate every second.
-
What is the relationship between
Roentgens and air kerma? - R x .01 = Gya
-
What is the relationship between
rad and grey? - rad x .01 = Gyt
-
What is the relationship between
rem and sievert? - rem x .01 = Sv
-
What is the relationship between
curie and becquerel - Ci x 3.7 x 10(10) = Bq
- How do you determine the number of Significant Figures of a number?
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1. Add all the non-zero numbers
2. then add all the zeroes between the non-zero numbers
3. then add all the zeroes at he beginning of the number. - What is the rule to convert larger decimal quantities to smaller?
- Move the point to the left.
- What is the rule to convert smaller decimal quantities to larger?
- move the decimal point to the right.