Quiz 1 Flashcards
(12^5)^3
12^15
(12^-5)^3
12^-15
log (xy)
log x + log y
log x/y
log x - log y
Accuracy
refers to how closely measured values
agree with the correct value
Precision
refers to how close a measurement is
to another measurement.
Can a measurement be
high precision but of low accuracy
yes
Median
first arrange your data set in ascending order. then identify the middle value: if there’s an even number, the median is the average of the two middle values
Mean
add all the numbers together then divide by the number of numbers
Mode
the most common number that appears in your set of data
what does r mean in graphing
r=1 indicates a perfect positive linear relationship
r=−1 indicates a perfect negative linear relationship
r=0 indicates no linear relationship.
what does R^2 mean in graphing
a measure of how well the regression line fits the data
Convert 298.16 degrees Kelvin (K) to degree Celsius (oC)
Celsius = 298.16 − 273.15
Kelvin = Celsius + 273.15
100 * infinity
infinity
100 / infinity
undefined
What would be the weight and mass of a 70 Kg person in an elevator going down vertically at the acceleration of 9.81 m/s2?
Weight = Mass × Accelerationduetogravity
Mass is a measure of the amount of matter in an object and is constant regardless of the situation. For a 70 kg person, the mass is always 70 kg.
abscissa is positive in what quadrant?
x-coordinate, I and IV quadrant
ordinate is positive in what quadrant?
y-coordinate, I and II quadrant
3^-5 ÷ 3^3 =3^x, solve x
-8 = x
(2^-4)^2 = 2^x, solve x
-8 = x
log (4/25)
2 log (2/5) and log 4 - log 25
Celsius to Fahrenheit
multiply the temperature in degrees Celsius by 1.8, and then add 32
Fahrenheit to Celsius
subtract 32 from the temperature in degrees Fahrenheit, and then divide by 1.8
1m^3
1,000,000 cubic centimeters (cc or cm³).
If a powder weight is recorded as 3.6 grams, what is the accepted tolerance based on the significant
figures?
a) 3.6 ± 0.005 grams
b) 3.6 ± 0.05 grams
c) 3.6 ± 0.5 grams
b) 3.6 ± 0.05 grams
The tolerance should reflect the precision of the measurement. For a measurement with two significant figures, the tolerance is typically one place beyond the last significant figure.
