FHMP 004 CAL: essential maths skills for medicine Flashcards
1
Q
Power of zero rule
A
Anything to the power of zero equals one
2
Q
what happens when the exponent is -1
A
a^-1 = 1/a (reciprocal)
3
Q
what happens when an exponent is a negative number?
A
a^-n = 1/a^n
4
Q
what happens when the exponent is a fraction?
A
a^1/n = nth root of a a^2/3 = cube root of a squared
5
Q
what is log10 (1)
A
0
because 10^0 = 1
6
Q
what is log10(1000)
A
3
because 10^3 = 1000
7
Q
what is x if log10x = -1
A
0.1
because x = 10^-1 = 0.1
8
Q
what is x if log10x = -14
A
10^-14
9
Q
What is the pH scale?
A
- a measure of how many free H+ ions there are in a solution
- logarithmic scale
- pH 7 = H+ conc of 10^-7
- pH 6 = H+ conc of 10^-6 (10 times stronger acid than pH 7)
