PHYSICS- lesson 1 significant digits

Question 1

significant digits

Answer 1

• describes how precise something is usually a mesurement

Question 1

what digits are always signifcant?

Answer 1

any number 1-9

Question 2

are leading zeros significant?

Answer 2

no

Question 3

are trailing zeros significant?

Answer 3

yes

Question 4

are zeros between 1-9 significant?

Answer 4

yes

Question 5

how many sigdigs in 0.001

Answer 5

only one

Question 6

how many sigdigs in 4.00078

Answer 6

6

Question 7

amount of sigdigs in 4039

Answer 7

4

Question 8

what number do we take after we multiply/divide sigdigs?

Answer 8

the smaller number always

Question 9

what number do we take after adding or subtracting sigdigs?

Answer 9

the number with the least decimal places (eg. 456.0914 - 35.21 = 420. 88, because 35.21 has two decimal places)

Question 10

converting units

Answer 10

units that want to be changed ON TOP of conversion factor.

Question 11

how many seconds in 1 hour

Answer 11

3600

Question 12

if the exponent is negative what is the notation used

Answer 12

the zeros are infront of desired number

Question 13

if the exponent is positive what is the notation used?

Answer 13

the zeros are behind the desired number