Scientific Notations Flashcards
1
Q
What is scientific notation?
A
Expresses numbers as a x 10^n , where a is a number between 1 and 10 and n is an integer
2
Q
Why is scientific notation important in radiotherapy?
A
Allows for easy representation and calculation of very large or small numbers, such as radiation doses, beam intensities and decay rates
3
Q
Convert 0.0000056 to scientific notation
A
5.6 x10^-6
4
Q
Express 45,000,000 in scientific notation
A
4.5 X10^7
^= power of n
5
Q
A linear attenuation coefficient μ has a value of
0.00012. Write it in scientific notation
A
1.2 x 10^-4
6
Q
If a beam intensity is reduced to 1 x10^-5 of its original value, what does this mean?
A
That the intensity is reduced to 0.00001
