Physics #10

Question 1

in scientific notation, what is the name of the number in front and the number in the exponent?

Answer 1

number in front: mantissa, significand, coefficient

number in exponent: exponent

Question 2

what do significant figures do?

Answer 2

they provide an indication of our certainty of a measurement
determined by the precision of the instrument being used for measurement

Question 3

multiplication and division vs. addition and subtraction for significant figures

Answer 3

m/d: at the end, same sig figs as the least number in any of the factors
a/s: decimal places are maintained

Question 4

in measurements, which digits are significant

Answer 4

all of them (not leading 0s) not including the last one because the last one is an estimate.

Question 5

what is the best way to round numbers when multiplying or dividing?

Answer 5

multiplying: round numbers in oppo directions
dividing: round numbers in same direction.

Question 6

square root of 169

Answer 6

13

Question 7

square root of 196

Answer 7

14

Question 8

square root of 225

Answer 8

15

Question 9

square root of 256

Answer 9

16

Question 10

square root of 289

Answer 10

17

Question 11

square root of 324

Answer 11

18

Question 12

square root of 361

Answer 12

19

Question 13

what is the square root of 2

Answer 13

1.4

Question 14

what is the square root of 3

Answer 14

1.7

Question 15

what is the value of e

Answer 15

2.718

Question 16

log base e is also what

Answer 16

natural log

Question 17

what are the possible values of sine, cosine, and tangent?

Answer 17

sine and cosine: -1,1

tangent: -infinity to infinity

Question 18

direct vs. indirect relationship

Answer 18

direct: increasing one variable proportionately increases the other
indirect: increasing one variable is associated with proportional decrease in the other

Question 19

tera- (T)

Answer 19

10^12

Question 20

giga- (G)

Answer 20

10^9

Question 21

mega- (M)

Answer 21

10^6

Question 22

hecto- (h)

Answer 22

10^2

Question 23

deka- (da)

Answer 23

10^1

Question 24

pico- (p)

Answer 24

10^-12

Question 25

1 Cal is how many cal

Answer 25

1000 cal

Question 26

1 cal is how many joules

Answer 26

4.184

Question 27

eV to Joules

Answer 27

1.6 x 10^-19

Question 28

in scientific notation, are all numbers used?

Answer 28

no, only the significant ones

Question 29

raising an exponent to another exponent requires ____ the exponents

Answer 29

multiplying

Question 30

relate sin theta and cos theta

Answer 30

sin theta = cos (90-theta)

Question 31

relate tangent to sine and cosine

Answer 31

tangent = sin(theta)/cos(theta)