uncertainties and significant figures

Question 1

what is physics

Answer 1

attempts to describe nature in an objective way through measurement

Question 2

uncertainties in measurements

Answer 2

plus or minus the smallest measurement or plus or minus half the smallest measurement on the instrument

Question 3

time =

Answer 3

distance/speed

Question 4

if m/s we should ?

Answer 4

convert the distance to m ex. 3.15cm x 10 to the power of -2m

Question 5

significant figures example

Answer 5

3.15 has 3 sig figs

Question 5

rule 1 of sig figures

Answer 5

when multiplying and dividing quantities leave as many sig figs in your answer as there are in the quantitiy with the least number of significant figs

Question 6

rule 2 of sig figs

Answer 6

adding and subtracting–> same number of decimal places in answer as there are in the quantitiy with the least number of decimal places

Question 7

which are more important the zeros after the first sig fig or the zeros before ?

Answer 7

the zeros after still count as sig figs so are important

Question 8

speed=

Answer 8

lenght/time

Question 9

measurement for speed

Answer 9

m/s or ms power minus 1

Question 10

scientific notation example

Answer 10

1m=1000mm —> 1x10^3mm
means 1x10x10x10=1000
2m=2x10x10x10=2000