Quiz 1

Question 1

(12^5)^3

Answer 1

12^15

Question 2

(12^-5)^3

Answer 2

12^-15

Question 3

log (xy)

Answer 3

log x + log y

Question 4

log x/y

Answer 4

log x - log y

Question 5

Accuracy

Answer 5

refers to how closely measured values
agree with the correct value

Question 6

Precision

Answer 6

refers to how close a measurement is
to another measurement.

Question 7

Can a measurement be
high precision but of low accuracy

Answer 7

yes

Question 8

Median

Answer 8

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

Question 9

Mean

Answer 9

add all the numbers together then divide by the number of numbers

Question 10

Mode

Answer 10

the most common number that appears in your set of data

Question 11

what does r mean in graphing

Answer 11

r=1 indicates a perfect positive linear relationship
r=−1 indicates a perfect negative linear relationship
r=0 indicates no linear relationship.

Question 12

what does R^2 mean in graphing

Answer 12

a measure of how well the regression line fits the data

Question 13

Convert 298.16 degrees Kelvin (K) to degree Celsius (oC)

Answer 13

Celsius = 298.16 − 273.15

Kelvin = Celsius + 273.15

Question 14

100 * infinity

Answer 14

infinity

Question 15

100 / infinity

Answer 15

undefined

Question 16

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?

Answer 16

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.

Question 17

abscissa is positive in what quadrant?

Answer 17

x-coordinate, I and IV quadrant

Question 18

ordinate is positive in what quadrant?

Answer 18

y-coordinate, I and II quadrant

Question 19

3^-5 ÷ 3^3 =3^x, solve x

Answer 19

-8 = x

Question 20

(2^-4)^2 = 2^x, solve x

Answer 20

-8 = x

Question 21

log (4/25)

Answer 21

2 log (2/5) and log 4 - log 25

Question 22

Celsius to Fahrenheit

Answer 22

multiply the temperature in degrees Celsius by 1.8, and then add 32

Question 23

Fahrenheit to Celsius

Answer 23

subtract 32 from the temperature in degrees Fahrenheit, and then divide by 1.8

Question 24

1m^3

Answer 24

1,000,000 cubic centimeters (cc or cm³).

Question 25

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

Answer 25

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.